#0255AD
Closest named color: Dusk Blue (#26538D). oklch(46.1% 0.157 256.2), rgb(2, 85, 173).
Aa
White text reads best on this color (7.22:1).
About this color
#0255AD is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.157 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.053 away. White text reads best on it, at 7.22:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.90:1 |
| White text | 7.22:1 |
Values
| HEX | #0255AD |
| RGB | rgb(2, 85, 173) |
| HSL | hsl(211, 98%, 34%) |
| OKLCH | oklch(46.1% 0.157 256.2) |
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 #0255AD | 7.22:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #0255AD | 2.90:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #0255AD text on white | 7.22:1 | AAA | Lc 84.3 | Fine for body text |
| #0255AD text on black | 2.90:1 | Fails | Lc -17.6 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A1C3F2
oklch(80.9% 0.076 256.6)
-
Step 400
400
#6DA3EB
oklch(70.8% 0.121 256)
-
Step 500
500
#4389E5
oklch(63% 0.156 256.3)
-
Step 600
600
#2171D3
oklch(55.6% 0.169 256.2)
-
Step 700
700 (this color)
#0255AD
oklch(46.1% 0.157 256.2)
-
Step 800
800
#134D94
oklch(42.6% 0.13 256.3)
-
Step 900
900
#184176
oklch(37.7% 0.101 256.3)
-
Step 950
950
#0F2645
oklch(26.9% 0.065 256.6)
#0255AD 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) | #1A5EB0 | 0.028 |
| Deuteranopia (no green cones) | #0050AB | 0.014 |
| Tritanopia (no blue cones) | #006B79 | 0.118 |
| Achromatopsia (no color) | #575757 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0255AD
#0255AD
oklch(46.1% 0.157 256.2)
- #774F00
#774F00
oklch(46.1% 0.097 75.4)
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 #0255AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.053
- Cobalt #1E488F ΔE 0.057
- Blue Blue #2242C7 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.062
- Mid Blue #276AB3 ΔE 0.064
- Light Navy #155084 ΔE 0.067
- Light Navy Blue #2E5A88 ΔE 0.068
- Sapphire #2138AB ΔE 0.069
Use #0255AD 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.