#255689
Closest named color: Dusk Blue (#26538D). oklch(44.6% 0.099 251.8), rgb(37, 86, 137).
Aa
White text reads best on this color (7.57:1).
About this color
#255689 is a dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.099 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.012 away. White text reads best on it, at 7.57:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.77:1 |
| White text | 7.57:1 |
Values
| HEX | #255689 |
| RGB | rgb(37, 86, 137) |
| HSL | hsl(211, 57%, 34%) |
| OKLCH | oklch(44.6% 0.099 251.8) |
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 #255689 | 7.57:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #255689 | 2.77:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #255689 text on white | 7.57:1 | AAA | Lc 86.1 | Fine for body text |
| #255689 text on black | 2.77:1 | Fails | Lc -16.0 | 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
#A6C4E6
oklch(81% 0.058 251.8)
-
Step 400
400
#75A4D9
oklch(70.6% 0.093 252.1)
-
Step 500
500
#508DCF
oklch(63.1% 0.119 251.9)
-
Step 600
600
#3176BC
oklch(55.6% 0.129 251.6)
-
Step 700
700
#2463A2
oklch(49.2% 0.119 251.6)
-
Step 800
800 (this color)
#255689
oklch(44.6% 0.099 251.8)
-
Step 900
900
#204369
oklch(37.6% 0.077 252.2)
-
Step 950
950
#13283E
oklch(27.1% 0.049 251.1)
#255689 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) | #3F598B | 0.030 |
| Deuteranopia (no green cones) | #305088 | 0.019 |
| Tritanopia (no blue cones) | #006269 | 0.075 |
| Achromatopsia (no color) | #545454 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255689
#255689
oklch(44.6% 0.099 251.8)
- #744A00
#744A00
oklch(44.6% 0.095 72.3)
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 #255689, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.012
- Light Navy Blue #2E5A88 ΔE 0.016
- Light Navy #155084 ΔE 0.024
- Deep Sea Blue #015482 ΔE 0.024
- Denim Blue #3B5B92 ΔE 0.032
- Cobalt #1E488F ΔE 0.045
- YInMn Blue #415A77 ΔE 0.045
- Denim #3B638C ΔE 0.047
Use #255689 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.