#255F79
Closest named color: YInMn Blue (#415A77). oklch(45.9% 0.073 230.7), rgb(37, 95, 121).
Aa
White text reads best on this color (7.01:1).
About this color
#255F79 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.073 and its hue 231°. 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 7.01:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.99:1 |
| White text | 7.01:1 |
Values
| HEX | #255F79 |
| RGB | rgb(37, 95, 121) |
| HSL | hsl(199, 53%, 31%) |
| OKLCH | oklch(45.9% 0.073 230.7) |
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 #255F79 | 7.01:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #255F79 | 2.99:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #255F79 text on white | 7.01:1 | AAA | Lc 84.1 | Fine for body text |
| #255F79 text on black | 2.99:1 | Fails | Lc -17.9 | 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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#AAC5D3
oklch(80.8% 0.035 230.3)
-
Step 400
400
#7DA8BE
oklch(70.8% 0.056 230.8)
-
Step 500
500
#5A92AD
oklch(63.2% 0.072 230.3)
-
Step 600
600
#3D7C99
oklch(55.7% 0.079 230.3)
-
Step 700
700 (this color)
#255F79
oklch(45.9% 0.073 230.7)
-
Step 800
800
#28556A
oklch(42.7% 0.06 230.7)
-
Step 900
900
#254656
oklch(37.6% 0.047 230.9)
-
Step 950
950
#172932
oklch(27% 0.029 231)
#255F79 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) | #525E7A | 0.050 |
| Deuteranopia (no green cones) | #465579 | 0.043 |
| Tritanopia (no blue cones) | #006668 | 0.044 |
| Achromatopsia (no color) | #595959 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255F79
#255F79
oklch(45.9% 0.073 230.7)
- #784B31
#784B31
oklch(45.8% 0.073 50.2)
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 #255F79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.029
- Petrol #005F6A ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.034
- Denim #3B638C ΔE 0.040
- Peacock Blue #016795 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.046
- Dark Aqua #05696B ΔE 0.046
- Denim Blue #3B5B92 ΔE 0.052
Use #255F79 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.