#2547AB
Closest named color: Sapphire (#2138AB). oklch(43.7% 0.165 265.6), rgb(37, 71, 171).
Aa
White text reads best on this color (8.17:1).
About this color
#2547AB is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.165 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.036 away. White text reads best on it, at 8.17:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.56:1 |
| White text | 8.17:1 |
Values
| HEX | #2547AB |
| RGB | rgb(37, 71, 171) |
| HSL | hsl(225, 64%, 41%) |
| OKLCH | oklch(43.7% 0.165 265.6) |
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 #2547AB | 8.17:1 | AAA | Lc -92.4 | Preferred for body text |
| Black text on #2547AB | 2.56:1 | Fails | Lc 16.3 | Dividers and decoration only |
| #2547AB text on white | 8.17:1 | AAA | Lc 87.7 | Fine for body text |
| #2547AB text on black | 2.56:1 | Fails | Lc -14.4 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8D9FE
oklch(88.5% 0.054 265.8)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#3664EE
oklch(55.6% 0.214 265.6)
-
Step 700
700
#2952CF
oklch(49.1% 0.199 265.5)
-
Step 800
800 (this color)
#2547AB
oklch(43.7% 0.165 265.6)
-
Step 900
900
#203B85
oklch(37.8% 0.129 265.5)
-
Step 950
950
#13234E
oklch(27% 0.082 265.8)
#2547AB 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) | #0056AE | 0.039 |
| Deuteranopia (no green cones) | #0049A9 | 0.020 |
| Tritanopia (no blue cones) | #006072 | 0.129 |
| Achromatopsia (no color) | #4F4F4F | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2547AB
#2547AB
oklch(43.7% 0.165 265.6)
- #684D00
#684D00
oklch(43.7% 0.09 85.3)
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 #2547AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.036
- Blue Blue #2242C7 ΔE 0.046
- Cobalt #1E488F ΔE 0.047
- Blueberry #464196 ΔE 0.052
- Dusk Blue #26538D ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.069
- Light Navy #155084 ΔE 0.072
Use #2547AB 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.