#255E9E
Closest named color: Denim Blue (#3B5B92). oklch(47.8% 0.119 253.7), rgb(37, 94, 158).
Aa
White text reads best on this color (6.61:1).
About this color
#255E9E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.119 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.026 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #255E9E |
| RGB | rgb(37, 94, 158) |
| HSL | hsl(212, 62%, 38%) |
| OKLCH | oklch(47.8% 0.119 253.7) |
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 #255E9E | 6.61:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #255E9E | 3.17:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #255E9E text on white | 6.61:1 | AA | Lc 82.4 | Fine for body text |
| #255E9E text on black | 3.17:1 | AA large text | Lc -19.5 | 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 700.
-
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
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A7C3E6
oklch(80.8% 0.058 254.2)
-
Step 400
400
#78A4D9
oklch(70.8% 0.092 253.6)
-
Step 500
500
#548CCF
oklch(63.1% 0.118 253.9)
-
Step 600
600
#3775BC
oklch(55.6% 0.128 253.7)
-
Step 700
700 (this color)
#255E9E
oklch(47.8% 0.119 253.7)
-
Step 800
800
#235083
oklch(42.6% 0.098 253.5)
-
Step 900
900
#224369
oklch(37.7% 0.076 253.3)
-
Step 950
950
#15273E
oklch(27% 0.049 255.2)
#255E9E 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) | #4063A1 | 0.031 |
| Deuteranopia (no green cones) | #2C589D | 0.017 |
| Tritanopia (no blue cones) | #006D76 | 0.091 |
| Achromatopsia (no color) | #5D5D5D | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255E9E
#255E9E
oklch(47.8% 0.119 253.7)
- #7F5300
#7F5300
oklch(47.9% 0.102 73.8)
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 #255E9E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.026
- Peacock Blue #016795 ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.035
- Dusky Blue #475F94 ΔE 0.037
- Dusk Blue #26538D ΔE 0.039
- Denim #3B638C ΔE 0.041
- Mid Blue #276AB3 ΔE 0.044
- French Blue #436BAD ΔE 0.054
Use #255E9E 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.