#617EB5
Closest named color: Off Blue (#5684AE). oklch(59.4% 0.091 262.6), rgb(97, 126, 181).
Aa
Black text reads best on this color (5.15:1).
About this color
#617EB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.091 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.025 away. Black text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.15:1 |
| White text | 4.06:1 |
Values
| HEX | #617EB5 |
| RGB | rgb(97, 126, 181) |
| HSL | hsl(219, 36%, 55%) |
| OKLCH | oklch(59.4% 0.091 262.6) |
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 #617EB5 | 4.06:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #617EB5 | 5.15:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #617EB5 text on white | 4.06:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #617EB5 text on black | 5.15:1 | AA | Lc -33.8 | 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
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B1C1DE
oklch(80.8% 0.045 262.4)
-
Step 400
400
#89A1CE
oklch(70.7% 0.072 262.8)
-
Step 500
500 (this color)
#617EB5
oklch(59.4% 0.091 262.6)
-
Step 600
600
#5472AD
oklch(55.5% 0.099 263)
-
Step 700
700
#446095
oklch(49.2% 0.092 262.3)
-
Step 800
800
#384E79
oklch(42.6% 0.077 262.9)
-
Step 900
900
#304161
oklch(37.6% 0.059 262.4)
-
Step 950
950
#1C2639
oklch(26.9% 0.038 262.7)
#617EB5 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) | #6A82B7 | 0.017 |
| Deuteranopia (no green cones) | #607AB4 | 0.011 |
| Tritanopia (no blue cones) | #408A91 | 0.083 |
| Achromatopsia (no color) | #7E7E7E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617EB5
#617EB5
oklch(59.4% 0.091 262.6)
- #997939
#997939
oklch(59.4% 0.091 82.7)
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 #617EB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.025
- Cool Blue #4984B8 ΔE 0.028
- Dusty Blue #5A86AD ΔE 0.029
- Steel Blue #4682B4 ΔE 0.030
- Faded Blue #658CBB ΔE 0.040
- Stormy Blue #507B9C ΔE 0.045
- Windows Blue #3778BF ΔE 0.051
- Cerulean #457B9D ΔE 0.051
Use #617EB5 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.