#255BA3
Closest named color: Denim Blue (#3B5B92). oklch(47.4% 0.129 256.8), rgb(37, 91, 163).
Aa
White text reads best on this color (6.76:1).
About this color
#255BA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.129 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.033 away. White text reads best on it, at 6.76:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.10:1 |
| White text | 6.76:1 |
Values
| HEX | #255BA3 |
| RGB | rgb(37, 91, 163) |
| HSL | hsl(214, 63%, 39%) |
| OKLCH | oklch(47.4% 0.129 256.8) |
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 #255BA3 | 6.76:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #255BA3 | 3.10:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #255BA3 text on white | 6.76:1 | AA | Lc 83.0 | Fine for body text |
| #255BA3 text on black | 3.10:1 | AA large text | Lc -19.0 | 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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF1
oklch(88.6% 0.035 256.3)
-
Step 300
300
#A7C3E9
oklch(80.9% 0.062 256.1)
-
Step 400
400
#78A3DF
oklch(70.8% 0.1 256.8)
-
Step 500
500
#548AD6
oklch(63% 0.129 257.1)
-
Step 600
600
#3873C3
oklch(55.6% 0.139 256.8)
-
Step 700
700 (this color)
#255BA3
oklch(47.4% 0.129 256.8)
-
Step 800
800
#244F88
oklch(42.8% 0.106 256.4)
-
Step 900
900
#22426D
oklch(37.7% 0.083 256.4)
-
Step 950
950
#152740
oklch(27.1% 0.053 256.9)
#255BA3 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) | #3761A6 | 0.026 |
| Deuteranopia (no green cones) | #1E56A2 | 0.016 |
| Tritanopia (no blue cones) | #006C77 | 0.099 |
| Achromatopsia (no color) | #5B5B5B | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255BA3
#255BA3
oklch(47.4% 0.129 256.8)
- #7B5300
#7B5300
oklch(47.4% 0.099 76.6)
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 #255BA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.033
- Dusk Blue #26538D ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.044
- Dusky Blue #475F94 ΔE 0.045
- Peacock Blue #016795 ΔE 0.046
- Mid Blue #276AB3 ΔE 0.047
- Denim #3B638C ΔE 0.052
- French Blue #436BAD ΔE 0.058
Use #255BA3 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.