#255688
Closest named color: Dusk Blue (#26538D). oklch(44.5% 0.098 251.4), rgb(37, 86, 136).
Aa
White text reads best on this color (7.59:1).
About this color
#255688 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.098 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.013 away. White text reads best on it, at 7.59:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.76:1 |
| White text | 7.59:1 |
Values
| HEX | #255688 |
| RGB | rgb(37, 86, 136) |
| HSL | hsl(210, 57%, 34%) |
| OKLCH | oklch(44.5% 0.098 251.4) |
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 #255688 | 7.59:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #255688 | 2.76:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #255688 text on white | 7.59:1 | AAA | Lc 86.1 | Fine for body text |
| #255688 text on black | 2.76:1 | Fails | Lc -15.9 | Dividers and decoration only |
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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A6C4E5
oklch(80.9% 0.057 251)
-
Step 400
400
#75A5D8
oklch(70.8% 0.091 250.7)
-
Step 500
500
#508DCE
oklch(63.1% 0.117 251.5)
-
Step 600
600
#3276BB
oklch(55.6% 0.127 251.5)
-
Step 700
700
#2463A1
oklch(49.1% 0.118 251.3)
-
Step 800
800 (this color)
#255688
oklch(44.5% 0.098 251.4)
-
Step 900
900
#204369
oklch(37.6% 0.077 252.2)
-
Step 950
950
#13283D
oklch(27.1% 0.048 250)
#255688 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) | #3F598A | 0.030 |
| Deuteranopia (no green cones) | #315087 | 0.019 |
| Tritanopia (no blue cones) | #006268 | 0.076 |
| Achromatopsia (no color) | #545454 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255688
#255688
oklch(44.5% 0.098 251.4)
- #744900
#744900
oklch(44.4% 0.096 71.2)
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 #255688, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.013
- Light Navy Blue #2E5A88 ΔE 0.016
- Deep Sea Blue #015482 ΔE 0.023
- Light Navy #155084 ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.032
- YInMn Blue #415A77 ΔE 0.044
- Cobalt #1E488F ΔE 0.046
- Denim #3B638C ΔE 0.047
Use #255688 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.