#255AC5
Closest named color: Warm Blue (#4B57DB). oklch(49.7% 0.177 262.2), rgb(37, 90, 197).
Aa
White text reads best on this color (6.27:1).
About this color
#255AC5 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.177 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.052 away. White text reads best on it, at 6.27:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.34:1 |
| White text | 6.27:1 |
Values
| HEX | #255AC5 |
| RGB | rgb(37, 90, 197) |
| HSL | hsl(220, 68%, 46%) |
| OKLCH | oklch(49.7% 0.177 262.2) |
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 #255AC5 | 6.27:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #255AC5 | 3.34:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #255AC5 text on white | 6.27:1 | AA | Lc 80.7 | Fine for body text |
| #255AC5 text on black | 3.34:1 | AA large text | Lc -21.2 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A3C1F9
oklch(80.9% 0.086 262.7)
-
Step 400
400
#719FF6
oklch(70.7% 0.138 262.3)
-
Step 500
500
#4C84F2
oklch(63.1% 0.175 262.3)
-
Step 600
600
#306BE0
oklch(55.7% 0.189 262.1)
-
Step 700
700 (this color)
#255AC5
oklch(49.7% 0.177 262.2)
-
Step 800
800
#1E499E
oklch(42.8% 0.147 262.1)
-
Step 900
900
#1E3E7D
oklch(37.7% 0.114 262.2)
-
Step 950
950
#122549
oklch(27% 0.071 261.9)
#255AC5 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) | #0068C9 | 0.036 |
| Deuteranopia (no green cones) | #0059C3 | 0.017 |
| Tritanopia (no blue cones) | #007487 | 0.135 |
| Achromatopsia (no color) | #606060 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255AC5
#255AC5
oklch(49.7% 0.177 262.2)
- #7F5C00
#7F5C00
oklch(49.8% 0.102 82.7)
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 #255AC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.052
- Mid Blue #276AB3 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.057
- Azul #1D5DEC ΔE 0.060
- Royal Blue #4169E1 ΔE 0.065
- Iris #6258C4 ΔE 0.071
- French Blue #436BAD ΔE 0.071
- Neon Blue #4361EE ΔE 0.073
Use #255AC5 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.