#2C4389
Closest named color: Cobalt (#1E488F). oklch(40.5% 0.12 267.2), rgb(44, 67, 137).
Aa
White text reads best on this color (9.24:1).
About this color
#2C4389 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.120 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.019 away. White text reads best on it, at 9.24:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.27:1 |
| White text | 9.24:1 |
Values
| HEX | #2C4389 |
| RGB | rgb(44, 67, 137) |
| HSL | hsl(225, 51%, 35%) |
| OKLCH | oklch(40.5% 0.12 267.2) |
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 #2C4389 | 9.24:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #2C4389 | 2.27:1 | Fails | Lc 12.9 | Not readable |
| #2C4389 text on white | 9.24:1 | AAA | Lc 91.0 | Preferred for body text |
| #2C4389 text on black | 2.27:1 | Fails | Lc -11.3 | 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
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ACC0EF
oklch(80.9% 0.07 266.8)
-
Step 400
400
#819EE7
oklch(70.7% 0.112 267)
-
Step 500
500
#6384E0
oklch(63.1% 0.144 267.4)
-
Step 600
600
#4B6CCE
oklch(55.7% 0.156 267.2)
-
Step 700
700
#3C59B2
oklch(49.1% 0.145 267.3)
-
Step 800
800 (this color)
#2C4389
oklch(40.5% 0.12 267.2)
-
Step 900
900
#2B3E73
oklch(37.7% 0.094 267)
-
Step 950
950
#192543
oklch(27% 0.058 266.1)
#2C4389 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) | #1C4C8C | 0.027 |
| Deuteranopia (no green cones) | #024388 | 0.031 |
| Tritanopia (no blue cones) | #00535F | 0.099 |
| Achromatopsia (no color) | #474747 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4389
#2C4389
oklch(40.5% 0.12 267.2)
- #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 #2C4389, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.019
- Twilight Blue #0A437A ΔE 0.039
- Light Navy #155084 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.041
- Blueberry #464196 ΔE 0.043
- Dusk Blue #26538D ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.056
- Sapphire #2138AB ΔE 0.064
Use #2C4389 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.