#2C3386
Closest named color: Twilight Blue (#0A437A). oklch(36.9% 0.137 273.9), rgb(44, 51, 134).
Aa
White text reads best on this color (10.90:1).
About this color
#2C3386 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.137 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.054 away. White text reads best on it, at 10.90:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #2C3386 |
| RGB | rgb(44, 51, 134) |
| HSL | hsl(235, 51%, 35%) |
| OKLCH | oklch(36.9% 0.137 273.9) |
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 #2C3386 | 10.90:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #2C3386 | 1.92:1 | Fails | Lc 9.1 | Not readable |
| #2C3386 text on white | 10.90:1 | AAA | Lc 94.8 | Preferred for body text |
| #2C3386 text on black | 1.92:1 | Fails | Lc -7.8 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FE
oklch(93.6% 0.029 273.1)
-
Step 200
200
#CDD7FF
oklch(88.4% 0.056 274.2)
-
Step 300
300
#ADBDFF
oklch(81% 0.095 273.6)
-
Step 400
400
#8497FF
oklch(70.7% 0.153 274)
-
Step 500
500
#6778FF
oklch(63% 0.199 273.8)
-
Step 600
600
#5159F5
oklch(55.5% 0.229 273.9)
-
Step 700
700
#4348D6
oklch(49.2% 0.212 273.9)
-
Step 800
800
#363CAD
oklch(42.7% 0.177 273.8)
-
Step 900
900 (this color)
#2C3386
oklch(36.9% 0.137 273.9)
-
Step 950
950
#1A2050
oklch(26.9% 0.087 273.6)
#2C3386 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) | #004189 | 0.045 |
| Deuteranopia (no green cones) | #003984 | 0.037 |
| Tritanopia (no blue cones) | #004857 | 0.114 |
| Achromatopsia (no color) | #3D3D3D | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C3386
#2C3386
oklch(36.9% 0.137 273.9)
- #4D3E00
#4D3E00
oklch(36.9% 0.076 93.4)
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 #2C3386, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.055
- Cobalt #1E488F ΔE 0.056
- Blueberry #464196 ΔE 0.062
- Sapphire #2138AB ΔE 0.063
- Marine Blue #01386A ΔE 0.064
- Royal #0C1793 ΔE 0.075
- Light Navy #155084 ΔE 0.080
Use #2C3386 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.