#255EB6
Closest named color: Mid Blue (#276AB3). oklch(49.4% 0.152 259.1), rgb(37, 94, 182).
Aa
White text reads best on this color (6.25:1).
About this color
#255EB6 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.152 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.035 away. White text reads best on it, at 6.25:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.35:1 |
| White text | 6.25:1 |
Values
| HEX | #255EB6 |
| RGB | rgb(37, 94, 182) |
| HSL | hsl(216, 66%, 43%) |
| OKLCH | oklch(49.4% 0.152 259.1) |
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 #255EB6 | 6.25:1 | AA | Lc -85.9 | Fine for body text |
| Black text on #255EB6 | 3.35:1 | AA large text | Lc 23.3 | Dividers and decoration only |
| #255EB6 text on white | 6.25:1 | AA | Lc 80.7 | Fine for body text |
| #255EB6 text on black | 3.35:1 | AA large text | Lc -21.1 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F1
oklch(80.8% 0.074 259.3)
-
Step 400
400
#73A1E9
oklch(70.6% 0.117 259.1)
-
Step 500
500
#4E88E3
oklch(63.1% 0.15 259.1)
-
Step 600
600
#3170D1
oklch(55.7% 0.163 259)
-
Step 700
700 (this color)
#255EB6
oklch(49.4% 0.152 259.1)
-
Step 800
800
#1F4C92
oklch(42.6% 0.126 259.1)
-
Step 900
900
#1F4075
oklch(37.7% 0.099 259.5)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#255EB6 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) | #2C67B9 | 0.026 |
| Deuteranopia (no green cones) | #005AB4 | 0.022 |
| Tritanopia (no blue cones) | #007381 | 0.117 |
| Achromatopsia (no color) | #606060 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255EB6
#255EB6
oklch(49.4% 0.152 259.1)
- #805900
#805900
oklch(49.3% 0.102 79)
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 #255EB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.059
- Dusky Blue #475F94 ΔE 0.063
- Peacock Blue #016795 ΔE 0.065
- Dusk Blue #26538D ΔE 0.069
- Warm Blue #4B57DB ΔE 0.072
- Flat Blue #3C73A8 ΔE 0.072
Use #255EB6 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.