#2544A1
Closest named color: Cobalt (#1E488F). oklch(42.3% 0.155 265.9), rgb(37, 68, 161).
Aa
White text reads best on this color (8.67:1).
About this color
#2544A1 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.155 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.033 away. White text reads best on it, at 8.67:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.42:1 |
| White text | 8.67:1 |
Values
| HEX | #2544A1 |
| RGB | rgb(37, 68, 161) |
| HSL | hsl(225, 63%, 39%) |
| OKLCH | oklch(42.3% 0.155 265.9) |
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 #2544A1 | 8.67:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #2544A1 | 2.42:1 | Fails | Lc 14.7 | Not readable |
| #2544A1 text on white | 8.67:1 | AAA | Lc 89.3 | Fine for body text |
| #2544A1 text on black | 2.42:1 | Fails | Lc -13.0 | Not readable |
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 800.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#C9D9FB
oklch(88.4% 0.05 265.4)
-
Step 300
300
#A5C0FC
oklch(80.9% 0.09 265.7)
-
Step 400
400
#769CFB
oklch(70.7% 0.146 266.3)
-
Step 500
500
#5480F8
oklch(63% 0.186 266.1)
-
Step 600
600
#3B66E7
oklch(55.6% 0.201 266)
-
Step 700
700
#2E54C9
oklch(49.2% 0.187 265.9)
-
Step 800
800 (this color)
#2544A1
oklch(42.3% 0.155 265.9)
-
Step 900
900
#233C81
oklch(37.8% 0.121 265.8)
-
Step 950
950
#14244B
oklch(27.1% 0.075 265)
#2544A1 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) | #0051A4 | 0.035 |
| Deuteranopia (no green cones) | #00469F | 0.021 |
| Tritanopia (no blue cones) | #005B6B | 0.123 |
| Achromatopsia (no color) | #4B4B4B | 0.156 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2544A1
#2544A1
oklch(42.3% 0.155 265.9)
- #634900
#634900
oklch(42.2% 0.086 85.1)
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 #2544A1, closest first.
No curated palette has a color within ΔE 0.04 of #2544A1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.033
- Sapphire #2138AB ΔE 0.033
- Blueberry #464196 ΔE 0.045
- Dusk Blue #26538D ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.058
- Blue Blue #2242C7 ΔE 0.061
- Light Navy #155084 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.069
Use #2544A1 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.