#618FEF
Closest named color: Cornflower Blue (#6495ED). oklch(66.2% 0.152 263.5), rgb(97, 143, 239).
Aa
Black text reads best on this color (6.68:1).
About this color
#618FEF is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.152 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.018 away. Black text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.68:1 |
| White text | 3.14:1 |
Values
| HEX | #618FEF |
| RGB | rgb(97, 143, 239) |
| HSL | hsl(221, 82%, 66%) |
| OKLCH | oklch(66.2% 0.152 263.5) |
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 #618FEF | 3.14:1 | AA large text | Lc -63.7 | Content text, not long reading |
| Black text on #618FEF | 6.68:1 | AA | Lc 45.8 | Large or bold text, headings |
| #618FEF text on white | 3.14:1 | AA large text | Lc 58.3 | Large or bold text, headings |
| #618FEF text on black | 6.68:1 | AA | Lc -43.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A8C1F1
oklch(80.9% 0.074 263.3)
-
Step 400
400
#7A9FEB
oklch(70.7% 0.119 263.8)
-
Step 500
500 (this color)
#618FEF
oklch(66.2% 0.152 263.5)
-
Step 600
600
#3E6DD3
oklch(55.7% 0.166 263.4)
-
Step 700
700
#315AB6
oklch(49% 0.153 263.7)
-
Step 800
800
#294A94
oklch(42.7% 0.128 263.8)
-
Step 900
900
#253F76
oklch(37.8% 0.099 263.4)
-
Step 950
950
#162545
oklch(27% 0.063 263.8)
#618FEF 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) | #6598F3 | 0.025 |
| Deuteranopia (no green cones) | #528BED | 0.020 |
| Tritanopia (no blue cones) | #00A4B3 | 0.131 |
| Achromatopsia (no color) | #919191 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #618FEF
#618FEF
oklch(66.2% 0.152 263.5)
- #BA8A00
#BA8A00
oklch(66.2% 0.136 83.8)
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 #618FEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.018
- Soft Blue #6488EA ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.033
- Dodger Blue #1E90FF ΔE 0.050
- Lavender Blue #8B88F8 ΔE 0.056
- Perrywinkle #8F8CE7 ΔE 0.057
- Cornflower #6A79F7 ΔE 0.058
Use #618FEF 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.