#255AC8
Closest named color: Warm Blue (#4B57DB). oklch(50% 0.181 262.5), rgb(37, 90, 200).
Aa
White text reads best on this color (6.22:1).
About this color
#255AC8 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.181 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.049 away. White text reads best on it, at 6.22:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.37:1 |
| White text | 6.22:1 |
Values
| HEX | #255AC8 |
| RGB | rgb(37, 90, 200) |
| HSL | hsl(220, 69%, 46%) |
| OKLCH | oklch(50% 0.181 262.5) |
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 #255AC8 | 6.22:1 | AA | Lc -85.6 | Fine for body text |
| Black text on #255AC8 | 3.37:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #255AC8 text on white | 6.22:1 | AA | Lc 80.4 | Fine for body text |
| #255AC8 text on black | 3.37:1 | AA large text | Lc -21.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A2C1FA
oklch(80.9% 0.088 262.4)
-
Step 400
400
#709FF7
oklch(70.7% 0.139 262.1)
-
Step 500
500
#4B84F4
oklch(63.2% 0.178 262.2)
-
Step 600
600
#2F6AE3
oklch(55.6% 0.195 262.4)
-
Step 700
700 (this color)
#255AC8
oklch(50% 0.181 262.5)
-
Step 800
800
#1E489F
oklch(42.7% 0.149 262.5)
-
Step 900
900
#1D3D7E
oklch(37.5% 0.117 262.5)
-
Step 950
950
#12254A
oklch(27.1% 0.073 262.2)
#255AC8 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) | #0068CC | 0.035 |
| Deuteranopia (no green cones) | #005AC6 | 0.016 |
| Tritanopia (no blue cones) | #007588 | 0.139 |
| Achromatopsia (no color) | #616161 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255AC8
#255AC8
oklch(50% 0.181 262.5)
- #805C00
#805C00
oklch(49.9% 0.103 82)
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 #255AC8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.049
- Azul #1D5DEC ΔE 0.056
- Blue Blue #2242C7 ΔE 0.057
- Mid Blue #276AB3 ΔE 0.057
- Royal Blue #4169E1 ΔE 0.062
- Neon Blue #4361EE ΔE 0.069
- Iris #6258C4 ΔE 0.071
- Cerulean Blue #056EEE ΔE 0.073
Use #255AC8 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.