#617FCA
Closest named color: Cool Blue (#4984B8). oklch(60.7% 0.12 266.4), rgb(97, 127, 202).
Aa
Black text reads best on this color (5.39:1).
About this color
#617FCA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.120 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.043 away. Black text reads best on it, at 5.39:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.39:1 |
| White text | 3.89:1 |
Values
| HEX | #617FCA |
| RGB | rgb(97, 127, 202) |
| HSL | hsl(223, 50%, 59%) |
| OKLCH | oklch(60.7% 0.12 266.4) |
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 #617FCA | 3.89:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #617FCA | 5.39:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #617FCA text on white | 3.89:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #617FCA text on black | 5.39:1 | AA | Lc -35.4 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AFC0E7
oklch(80.8% 0.058 266.6)
-
Step 400
400
#869FDC
oklch(70.7% 0.094 266.9)
-
Step 500
500 (this color)
#617FCA
oklch(60.7% 0.12 266.4)
-
Step 600
600
#506FBF
oklch(55.7% 0.13 266.3)
-
Step 700
700
#415CA5
oklch(49.1% 0.121 266.7)
-
Step 800
800
#354C86
oklch(42.8% 0.1 266)
-
Step 900
900
#2E3F6B
oklch(37.6% 0.079 266.7)
-
Step 950
950
#1B253F
oklch(26.9% 0.051 267)
#617FCA 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) | #6186CD | 0.019 |
| Deuteranopia (no green cones) | #557DC8 | 0.016 |
| Tritanopia (no blue cones) | #2F8F9B | 0.107 |
| Achromatopsia (no color) | #818181 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617FCA
#617FCA
oklch(60.7% 0.12 266.4)
- #A27C12
#A27C12
oklch(60.7% 0.12 86)
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 #617FCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.043
- Steel Blue #4682B4 ΔE 0.048
- Faded Blue #658CBB ΔE 0.048
- Soft Blue #6488EA ΔE 0.051
- Off Blue #5684AE ΔE 0.051
- Windows Blue #3778BF ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.053
- Dusty Blue #5A86AD ΔE 0.054
Use #617FCA 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.