#617CB9
Closest named color: Cool Blue (#4984B8). oklch(59.2% 0.099 265.3), rgb(97, 124, 185).
Aa
Black text reads best on this color (5.09:1).
About this color
#617CB9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 59%, its chroma 0.099 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.032 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #617CB9 |
| RGB | rgb(97, 124, 185) |
| HSL | hsl(222, 39%, 55%) |
| OKLCH | oklch(59.2% 0.099 265.3) |
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 #617CB9 | 4.12:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #617CB9 | 5.09:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #617CB9 text on white | 4.12:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #617CB9 text on black | 5.09:1 | AA | Lc -33.4 | 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 600.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B3C1DE
oklch(81% 0.044 264.9)
-
Step 400
400
#8BA0CE
oklch(70.6% 0.072 265.5)
-
Step 500
500
#6F88C1
oklch(63.1% 0.091 265.7)
-
Step 600
600 (this color)
#617CB9
oklch(59.2% 0.099 265.3)
-
Step 700
700
#475F95
oklch(49.1% 0.092 265)
-
Step 800
800
#3B4E79
oklch(42.8% 0.076 265.2)
-
Step 900
900
#324161
oklch(37.7% 0.059 264.6)
-
Step 950
950
#1D2639
oklch(27% 0.038 264.5)
#617CB9 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) | #6581BC | 0.015 |
| Deuteranopia (no green cones) | #5C79B8 | 0.011 |
| Tritanopia (no blue cones) | #3E8992 | 0.089 |
| Achromatopsia (no color) | #7D7D7D | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #617CB9
#617CB9
oklch(59.2% 0.099 265.3)
- #98792F
#98792F
oklch(59.2% 0.099 85.9)
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 #617CB9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.032
- Off Blue #5684AE ΔE 0.034
- Steel Blue #4682B4 ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.038
- Faded Blue #658CBB ΔE 0.046
- Windows Blue #3778BF ΔE 0.047
- Stormy Blue #507B9C ΔE 0.051
- Cerulean #457B9D ΔE 0.056
Use #617CB9 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.