#255E7A
Closest named color: YInMn Blue (#415A77). oklch(45.7% 0.074 233.1), rgb(37, 94, 122).
Aa
White text reads best on this color (7.09:1).
About this color
#255E7A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.074 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.029 away. White text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.96:1 |
| White text | 7.09:1 |
Values
| HEX | #255E7A |
| RGB | rgb(37, 94, 122) |
| HSL | hsl(200, 53%, 31%) |
| OKLCH | oklch(45.7% 0.074 233.1) |
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 #255E7A | 7.09:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #255E7A | 2.96:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #255E7A text on white | 7.09:1 | AAA | Lc 84.4 | Fine for body text |
| #255E7A text on black | 2.96:1 | Fails | Lc -17.6 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A6C6D9
oklch(80.9% 0.044 234.1)
-
Step 400
400
#74A8C5
oklch(70.6% 0.069 233.5)
-
Step 500
500
#4D93B7
oklch(63.2% 0.089 233)
-
Step 600
600
#2C7CA3
oklch(55.6% 0.097 233.8)
-
Step 700
700
#1D698B
oklch(49.2% 0.089 232.6)
-
Step 800
800 (this color)
#255E7A
oklch(45.7% 0.074 233.1)
-
Step 900
900
#1D475B
oklch(37.8% 0.058 231.8)
-
Step 950
950
#122936
oklch(26.9% 0.038 235.3)
#255E7A 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) | #505D7B | 0.048 |
| Deuteranopia (no green cones) | #45547A | 0.043 |
| Tritanopia (no blue cones) | #006567 | 0.047 |
| Achromatopsia (no color) | #585858 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255E7A
#255E7A
oklch(45.7% 0.074 233.1)
- #784B2E
#784B2E
oklch(45.8% 0.075 52.7)
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 #255E7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.030
- Petrol #005F6A ΔE 0.035
- Denim #3B638C ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.043
- Peacock Blue #016795 ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.049
- Dark Aqua #05696B ΔE 0.050
Use #255E7A 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.