#2C4388
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.119 267.1), rgb(44, 67, 136).
Aa
White text reads best on this color (9.26:1).
About this color
#2C4388 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.119 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 9.26:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #2C4388 |
| RGB | rgb(44, 67, 136) |
| HSL | hsl(225, 51%, 35%) |
| OKLCH | oklch(40.4% 0.119 267.1) |
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 #2C4388 | 9.26:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #2C4388 | 2.26:1 | Fails | Lc 12.9 | Not readable |
| #2C4388 text on white | 9.26:1 | AAA | Lc 91.1 | Preferred for body text |
| #2C4388 text on black | 2.26:1 | Fails | Lc -11.2 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F3
oklch(88.5% 0.038 267.3)
-
Step 300
300
#ADC0EE
oklch(80.9% 0.069 267.3)
-
Step 400
400
#829EE6
oklch(70.7% 0.111 267.3)
-
Step 500
500
#6384DF
oklch(63.1% 0.142 267.3)
-
Step 600
600
#4B6CCD
oklch(55.7% 0.154 267.2)
-
Step 700
700
#3C5AB1
oklch(49.2% 0.143 266.8)
-
Step 800
800 (this color)
#2C4388
oklch(40.4% 0.119 267.1)
-
Step 900
900
#2B3E72
oklch(37.6% 0.092 266.9)
-
Step 950
950
#1A2543
oklch(27.1% 0.058 267.3)
#2C4388 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) | #1D4C8B | 0.026 |
| Deuteranopia (no green cones) | #054387 | 0.029 |
| Tritanopia (no blue cones) | #00535F | 0.098 |
| Achromatopsia (no color) | #474747 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4388
#2C4388
oklch(40.4% 0.119 267.1)
- #5C4500
#5C4500
oklch(40.4% 0.083 86.9)
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 #2C4388, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Twilight Blue #0A437A ΔE 0.038
- Light Navy #155084 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.042
- Blueberry #464196 ΔE 0.044
- Dusk Blue #26538D ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.055
- Twilight #4E518B ΔE 0.065
Use #2C4388 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.