#2C3C81
Closest named color: Twilight Blue (#0A437A). oklch(38.3% 0.118 270.2), rgb(44, 60, 129).
Aa
White text reads best on this color (10.14:1).
About this color
#2C3C81 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.118 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.035 away. White text reads best on it, at 10.14:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.07:1 |
| White text | 10.14:1 |
Values
| HEX | #2C3C81 |
| RGB | rgb(44, 60, 129) |
| HSL | hsl(229, 49%, 34%) |
| OKLCH | oklch(38.3% 0.118 270.2) |
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 #2C3C81 | 10.14:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #2C3C81 | 2.07:1 | Fails | Lc 10.7 | Not readable |
| #2C3C81 text on white | 10.14:1 | AAA | Lc 93.3 | Preferred for body text |
| #2C3C81 text on black | 2.07:1 | Fails | Lc -9.2 | 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 900.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#AABEFA
oklch(80.8% 0.088 270.1)
-
Step 400
400
#7F9AF8
oklch(70.6% 0.141 270.4)
-
Step 500
500
#617EF5
oklch(63.1% 0.18 270.2)
-
Step 600
600
#4A64E4
oklch(55.7% 0.196 270.1)
-
Step 700
700
#3C52C6
oklch(49.2% 0.182 270.2)
-
Step 800
800
#3144A0
oklch(42.8% 0.15 270)
-
Step 900
900 (this color)
#2C3C81
oklch(38.3% 0.118 270.2)
-
Step 950
950
#19234A
oklch(27.1% 0.073 270.1)
#2C3C81 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) | #134583 | 0.031 |
| Deuteranopia (no green cones) | #003E80 | 0.034 |
| Tritanopia (no blue cones) | #004C58 | 0.099 |
| Achromatopsia (no color) | #414141 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C3C81
#2C3C81
oklch(38.3% 0.118 270.2)
- #534100
#534100
oklch(38.4% 0.078 90.9)
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 #2C3C81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Cobalt #1E488F ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.046
- Blueberry #464196 ΔE 0.055
- Light Navy #155084 ΔE 0.057
- Marine Blue #01386A ΔE 0.058
- Dusk Blue #26538D ΔE 0.065
- Deep Sea Blue #015482 ΔE 0.070
Use #2C3C81 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.