#2C4571
Closest named color: Twilight Blue (#0A437A). oklch(39.3% 0.081 261), rgb(44, 69, 113).
Aa
White text reads best on this color (9.55:1).
About this color
#2C4571 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.081 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.033 away. White text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #2C4571 |
| RGB | rgb(44, 69, 113) |
| HSL | hsl(218, 44%, 31%) |
| OKLCH | oklch(39.3% 0.081 261) |
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 #2C4571 | 9.55:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #2C4571 | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #2C4571 text on white | 9.55:1 | AAA | Lc 92.0 | Preferred for body text |
| #2C4571 text on black | 2.19:1 | Fails | Lc -10.4 | 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 900.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CDDAF0
oklch(88.5% 0.033 261)
-
Step 300
300
#ABC2E9
oklch(81% 0.061 261)
-
Step 400
400
#7EA1DE
oklch(70.7% 0.098 261.2)
-
Step 500
500
#5D89D4
oklch(63.2% 0.124 260.5)
-
Step 600
600
#4471C2
oklch(55.7% 0.136 261.2)
-
Step 700
700
#355EA7
oklch(49% 0.126 261)
-
Step 800
800
#2D4D87
oklch(42.6% 0.104 261.3)
-
Step 900
900 (this color)
#2C4571
oklch(39.3% 0.081 261)
-
Step 950
950
#18263F
oklch(27% 0.051 261.4)
#2C4571 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) | #334973 | 0.016 |
| Deuteranopia (no green cones) | #2A4270 | 0.010 |
| Tritanopia (no blue cones) | #004F55 | 0.072 |
| Achromatopsia (no color) | #454545 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4571
#2C4571
oklch(39.3% 0.081 261)
- #5C4000
#5C4000
oklch(39.3% 0.081 80.5)
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 #2C4571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.040
- Light Navy #155084 ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.050
- Cobalt #1E488F ΔE 0.050
- Charcoal #264653 ΔE 0.055
- Dusk Blue #26538D ΔE 0.056
- Marine Blue #01386A ΔE 0.059
Use #2C4571 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.