#617FEF
Closest named color: Cornflower (#6A79F7). oklch(62.9% 0.171 269.7), rgb(97, 127, 239).
Aa
Black text reads best on this color (5.79:1).
About this color
#617FEF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.171 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.022 away. Black text reads best on it, at 5.79:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.79:1 |
| White text | 3.62:1 |
Values
| HEX | #617FEF |
| RGB | rgb(97, 127, 239) |
| HSL | hsl(227, 82%, 66%) |
| OKLCH | oklch(62.9% 0.171 269.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #617FEF | 3.62:1 | AA large text | Lc -69.1 | Content text, not long reading |
| Black text on #617FEF | 5.79:1 | AA | Lc 40.5 | Non-text elements, placeholder text |
| #617FEF text on white | 3.62:1 | AA large text | Lc 63.6 | Content text, not long reading |
| #617FEF text on black | 5.79:1 | AA | Lc -38.1 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ABBFF8
oklch(81% 0.084 269.5)
-
Step 400
400
#809BF4
oklch(70.7% 0.134 269.9)
-
Step 500
500 (this color)
#617FEF
oklch(62.9% 0.171 269.7)
-
Step 600
600
#4A66DE
oklch(55.6% 0.185 269.5)
-
Step 700
700
#3C54C1
oklch(49.2% 0.172 269.6)
-
Step 800
800
#31459C
oklch(42.6% 0.143 269.6)
-
Step 900
900
#2B3B7C
oklch(37.7% 0.112 269.9)
-
Step 950
950
#192349
oklch(27% 0.072 270)
#617FEF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #488DF3 | 0.039 |
| Deuteranopia (no green cones) | #3080ED | 0.044 |
| Tritanopia (no blue cones) | #0098AB | 0.149 |
| Achromatopsia (no color) | #868686 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617FEF
#617FEF
oklch(62.9% 0.171 269.7)
- #A78400
#A78400
oklch(62.9% 0.128 89.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #617FEF, closest first.
No curated palette has a color within ΔE 0.04 of #617FEF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.022
- Soft Blue #6488EA ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.050
- Clear Blue #247AFD ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.060
- Medium Slate Blue #7B68EE ΔE 0.060
Use #617FEF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.