#2544AF
Closest named color: Sapphire (#2138AB). oklch(43.5% 0.174 266.5), rgb(37, 68, 175).
Aa
White text reads best on this color (8.31:1).
About this color
#2544AF is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.174 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.030 away. White text reads best on it, at 8.31:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.52:1 |
| White text | 8.31:1 |
Values
| HEX | #2544AF |
| RGB | rgb(37, 68, 175) |
| HSL | hsl(227, 65%, 42%) |
| OKLCH | oklch(43.5% 0.174 266.5) |
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 #2544AF | 8.31:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #2544AF | 2.52:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #2544AF text on white | 8.31:1 | AAA | Lc 88.1 | Fine for body text |
| #2544AF text on black | 2.52:1 | Fails | Lc -14.1 | 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
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#759CFF
oklch(70.8% 0.151 266.4)
-
Step 500
500
#527EFF
oklch(63% 0.198 266.5)
-
Step 600
600
#3761F5
oklch(55.7% 0.226 266.5)
-
Step 700
700
#2A4FD5
oklch(49.1% 0.209 266.4)
-
Step 800
800 (this color)
#2544AF
oklch(43.5% 0.174 266.5)
-
Step 900
900
#203988
oklch(37.6% 0.136 266.5)
-
Step 950
950
#132250
oklch(26.9% 0.087 266.8)
#2544AF 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) | #0055B3 | 0.042 |
| Deuteranopia (no green cones) | #0048AD | 0.021 |
| Tritanopia (no blue cones) | #005F73 | 0.135 |
| Achromatopsia (no color) | #4E4E4E | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2544AF
#2544AF
oklch(43.5% 0.174 266.5)
- #664D00
#664D00
oklch(43.5% 0.089 87.1)
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 #2544AF, closest first.
No curated palette has a color within ΔE 0.04 of #2544AF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.030
- Blue Blue #2242C7 ΔE 0.038
- Cobalt #1E488F ΔE 0.054
- Majorelle Blue #3F37C9 ΔE 0.054
- Blueberry #464196 ΔE 0.057
- Blue With A Hint Of Purple #533CC6 ΔE 0.071
- Dusk Blue #26538D ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.073
Use #2544AF 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.