#255A99
Closest named color: Denim Blue (#3B5B92). oklch(46.5% 0.117 254.7), rgb(37, 90, 153).
Aa
White text reads best on this color (6.99:1).
About this color
#255A99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.117 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.024 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #255A99 |
| RGB | rgb(37, 90, 153) |
| HSL | hsl(213, 61%, 37%) |
| OKLCH | oklch(46.5% 0.117 254.7) |
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 #255A99 | 6.99:1 | AA | Lc -88.9 | Fine for body text |
| Black text on #255A99 | 3.00:1 | AA large text | Lc 20.1 | Dividers and decoration only |
| #255A99 text on white | 6.99:1 | AA | Lc 83.9 | Fine for body text |
| #255A99 text on black | 3.00:1 | AA large text | Lc -18.1 | 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
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDBEE
oklch(88.6% 0.031 254.3)
-
Step 300
300
#A8C3E5
oklch(80.9% 0.057 254.3)
-
Step 400
400
#7AA3D8
oklch(70.6% 0.09 255.1)
-
Step 500
500
#568CCE
oklch(63.2% 0.116 254.3)
-
Step 600
600
#3B75BB
oklch(55.7% 0.125 254.5)
-
Step 700
700 (this color)
#255A99
oklch(46.5% 0.117 254.7)
-
Step 800
800
#265083
oklch(42.8% 0.097 254.7)
-
Step 900
900
#244369
oklch(37.8% 0.075 254.5)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#255A99 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) | #3C5F9C | 0.028 |
| Deuteranopia (no green cones) | #295498 | 0.017 |
| Tritanopia (no blue cones) | #006972 | 0.090 |
| Achromatopsia (no color) | #595959 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255A99
#255A99
oklch(46.5% 0.117 254.7)
- #795000
#795000
oklch(46.5% 0.098 75)
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 #255A99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.024
- Dusk Blue #26538D ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.028
- Peacock Blue #016795 ΔE 0.041
- Dusky Blue #475F94 ΔE 0.041
- Denim #3B638C ΔE 0.044
- Light Navy #155084 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.046
Use #255A99 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.