#617EB9
Closest named color: Cool Blue (#4984B8). oklch(59.6% 0.097 263.7), rgb(97, 126, 185).
Aa
Black text reads best on this color (5.19:1).
About this color
#617EB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.097 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.029 away. Black text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.19:1 |
| White text | 4.04:1 |
Values
| HEX | #617EB9 |
| RGB | rgb(97, 126, 185) |
| HSL | hsl(220, 39%, 55%) |
| OKLCH | oklch(59.6% 0.097 263.7) |
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 #617EB9 | 4.04:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #617EB9 | 5.19:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #617EB9 text on white | 4.04:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #617EB9 text on black | 5.19:1 | AA | Lc -34.1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0D9EB
oklch(88.4% 0.027 264.4)
-
Step 300
300
#B1C1E0
oklch(80.9% 0.047 263.7)
-
Step 400
400
#88A1D1
oklch(70.8% 0.076 263.2)
-
Step 500
500 (this color)
#617EB9
oklch(59.6% 0.097 263.7)
-
Step 600
600
#5372B1
oklch(55.7% 0.105 263.5)
-
Step 700
700
#445F98
oklch(49.1% 0.097 264)
-
Step 800
800
#384E7B
oklch(42.8% 0.08 263.6)
-
Step 900
900
#304163
oklch(37.7% 0.063 263.4)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#617EB9 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) | #6883BB | 0.017 |
| Deuteranopia (no green cones) | #5E7BB8 | 0.010 |
| Tritanopia (no blue cones) | #3D8B93 | 0.088 |
| Achromatopsia (no color) | #7E7E7E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617EB9
#617EB9
oklch(59.6% 0.097 263.7)
- #9A7A33
#9A7A33
oklch(59.6% 0.097 84.6)
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 #617EB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.029
- Off Blue #5684AE ΔE 0.030
- Steel Blue #4682B4 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.034
- Faded Blue #658CBB ΔE 0.040
- Windows Blue #3778BF ΔE 0.049
- Stormy Blue #507B9C ΔE 0.051
- Cerulean #457B9D ΔE 0.056
Use #617EB9 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.