#255170
Closest named color: Deep Sea Blue (#015482). oklch(41.9% 0.071 241.9), rgb(37, 81, 112).
Aa
White text reads best on this color (8.43:1).
About this color
#255170 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.071 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.032 away. White text reads best on it, at 8.43:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.48:1 |
| White text | 8.43:1 |
Values
| HEX | #255170 |
| RGB | rgb(37, 81, 112) |
| HSL | hsl(205, 50%, 29%) |
| OKLCH | oklch(41.9% 0.071 241.9) |
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 #255170 | 8.43:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #255170 | 2.48:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #255170 text on white | 8.43:1 | AAA | Lc 88.9 | Fine for body text |
| #255170 text on black | 2.48:1 | Fails | Lc -13.3 | Not readable |
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 800.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDBE7
oklch(88.4% 0.023 241.9)
-
Step 300
300
#AAC5DA
oklch(81% 0.042 241.5)
-
Step 400
400
#7CA6C7
oklch(70.7% 0.067 242.5)
-
Step 500
500
#5990B9
oklch(63.2% 0.085 242.1)
-
Step 600
600
#3D79A5
oklch(55.5% 0.093 242.7)
-
Step 700
700
#2E668D
oklch(49.1% 0.086 241.9)
-
Step 800
800 (this color)
#255170
oklch(41.9% 0.071 241.9)
-
Step 900
900
#25455D
oklch(37.7% 0.056 242.6)
-
Step 950
950
#162936
oklch(27.1% 0.035 239.7)
#255170 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) | #435171 | 0.035 |
| Deuteranopia (no green cones) | #394A6F | 0.028 |
| Tritanopia (no blue cones) | #00595C | 0.053 |
| Achromatopsia (no color) | #4D4D4D | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255170
#255170
oklch(41.9% 0.071 241.9)
- #684320
#684320
oklch(41.8% 0.071 62.1)
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 #255170, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.032
- Light Navy #155084 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.043
- YInMn Blue #415A77 ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusk Blue #26538D ΔE 0.048
- Deep Teal #00555A ΔE 0.049
- Petrol #005F6A ΔE 0.050
Use #255170 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.