#2541AA
Closest named color: Sapphire (#2138AB). oklch(42.4% 0.171 267), rgb(37, 65, 170).
Aa
White text reads best on this color (8.69:1).
About this color
#2541AA is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.171 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.022 away. White text reads best on it, at 8.69:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.41:1 |
| White text | 8.69:1 |
Values
| HEX | #2541AA |
| RGB | rgb(37, 65, 170) |
| HSL | hsl(227, 64%, 41%) |
| OKLCH | oklch(42.4% 0.171 267) |
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 #2541AA | 8.69:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #2541AA | 2.41:1 | Fails | Lc 14.8 | Not readable |
| #2541AA text on white | 8.69:1 | AAA | Lc 89.2 | Fine for body text |
| #2541AA text on black | 2.41:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C9D9FF
oklch(88.6% 0.055 267.2)
-
Step 300
300
#A5BFFF
oklch(80.9% 0.095 267.2)
-
Step 400
400
#769BFF
oklch(70.7% 0.152 267.2)
-
Step 500
500
#547EFF
oklch(63.1% 0.197 267)
-
Step 600
600
#3A61F3
oklch(55.6% 0.223 267.1)
-
Step 700
700
#2D4FD3
oklch(49.1% 0.206 266.9)
-
Step 800
800 (this color)
#2541AA
oklch(42.4% 0.171 267)
-
Step 900
900
#223987
oklch(37.6% 0.134 267.2)
-
Step 950
950
#14224F
oklch(26.9% 0.085 267.4)
#2541AA 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) | #0052AD | 0.043 |
| Deuteranopia (no green cones) | #0045A8 | 0.022 |
| Tritanopia (no blue cones) | #005C6F | 0.134 |
| Achromatopsia (no color) | #4B4B4B | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2541AA
#2541AA
oklch(42.4% 0.171 267)
- #634A00
#634A00
oklch(42.4% 0.087 86.3)
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 #2541AA, closest first.
No curated palette has a color within ΔE 0.04 of #2541AA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.022
- Blue Blue #2242C7 ΔE 0.046
- Cobalt #1E488F ΔE 0.049
- Blueberry #464196 ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.068
- Dusk Blue #26538D ΔE 0.071
- Indigo Blue #3A18B1 ΔE 0.071
Use #2541AA 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.