#2C4178
Closest named color: Twilight Blue (#0A437A). oklch(38.8% 0.097 266.3), rgb(44, 65, 120).
Aa
White text reads best on this color (9.83:1).
About this color
#2C4178 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.097 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.028 away. White text reads best on it, at 9.83:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.13:1 |
| White text | 9.83:1 |
Values
| HEX | #2C4178 |
| RGB | rgb(44, 65, 120) |
| HSL | hsl(223, 46%, 32%) |
| OKLCH | oklch(38.8% 0.097 266.3) |
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 #2C4178 | 9.83:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #2C4178 | 2.13:1 | Fails | Lc 11.3 | Not readable |
| #2C4178 text on white | 9.83:1 | AAA | Lc 92.6 | Preferred for body text |
| #2C4178 text on black | 2.13:1 | Fails | Lc -9.8 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ABC0F1
oklch(80.9% 0.073 266.7)
-
Step 400
400
#7F9EEA
oklch(70.7% 0.117 266.5)
-
Step 500
500
#5F84E3
oklch(63.1% 0.149 266.2)
-
Step 600
600
#476BD1
oklch(55.5% 0.162 266.5)
-
Step 700
700
#3959B5
oklch(49.1% 0.151 266.5)
-
Step 800
800
#2F4992
oklch(42.6% 0.124 266.4)
-
Step 900
900 (this color)
#2C4178
oklch(38.8% 0.097 266.3)
-
Step 950
950
#182544
oklch(27% 0.061 265.4)
#2C4178 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) | #28477A | 0.017 |
| Deuteranopia (no green cones) | #1C4077 | 0.018 |
| Tritanopia (no blue cones) | #004D56 | 0.084 |
| Achromatopsia (no color) | #434343 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4178
#2C4178
oklch(38.8% 0.097 266.3)
- #574100
#574100
oklch(38.9% 0.079 86.8)
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 #2C4178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.028
- Cobalt #1E488F ΔE 0.041
- Light Navy #155084 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.054
- Marine Blue #01386A ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.057
- Dusk Blue #26538D ΔE 0.058
Use #2C4178 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.