#617BA8
Closest named color: Off Blue (#5684AE). oklch(58.1% 0.076 261.1), rgb(97, 123, 168).
Aa
Black text reads best on this color (4.90:1).
About this color
#617BA8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.076 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.026 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 4.90:1 |
| White text | 4.27:1 |
Values
| HEX | #617BA8 |
| RGB | rgb(97, 123, 168) |
| HSL | hsl(218, 29%, 52%) |
| OKLCH | oklch(58.1% 0.076 261.1) |
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 #617BA8 | 4.27:1 | AA large text | Lc -75.0 | Fine for body text |
| Black text on #617BA8 | 4.90:1 | AA | Lc 34.5 | Non-text elements, placeholder text |
| #617BA8 text on white | 4.27:1 | AA large text | Lc 69.5 | Content text, not long reading |
| #617BA8 text on black | 4.90:1 | AA | Lc -32.1 | 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 600.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2DAE6
oklch(88.6% 0.019 258.4)
-
Step 300
300
#B4C1D7
oklch(80.8% 0.034 261)
-
Step 400
400
#8EA1C3
oklch(70.6% 0.054 262)
-
Step 500
500
#728AB4
oklch(63.1% 0.069 261.4)
-
Step 600
600 (this color)
#617BA8
oklch(58.1% 0.076 261.1)
-
Step 700
700
#4A6189
oklch(49.1% 0.07 261.1)
-
Step 800
800
#3D4F6F
oklch(42.7% 0.058 261.6)
-
Step 900
900
#34425A
oklch(37.7% 0.045 261)
-
Step 950
950
#1E2735
oklch(27.1% 0.029 259.1)
#617BA8 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) | #6B7EAA | 0.017 |
| Deuteranopia (no green cones) | #6377A7 | 0.011 |
| Tritanopia (no blue cones) | #48858B | 0.068 |
| Achromatopsia (no color) | #7A7A7A | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617BA8
#617BA8
oklch(58.1% 0.076 261.1)
- #927644
#927644
oklch(58.1% 0.076 80.9)
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 #617BA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.026
- Stormy Blue #507B9C ΔE 0.029
- Dusty Blue #5A86AD ΔE 0.030
- Steel Blue #4682B4 ΔE 0.034
- Cool Blue #4984B8 ΔE 0.036
- Cerulean #457B9D ΔE 0.037
- Dull Blue #49759C ΔE 0.039
- Grey Blue #647D8E ΔE 0.043
Use #617BA8 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.