#2D3772
Closest named color: Twilight Blue (#0A437A). oklch(36.2% 0.101 273.1), rgb(45, 55, 114).
Aa
White text reads best on this color (11.04:1).
About this color
#2D3772 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.101 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.042 away. White text reads best on it, at 11.04:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #2D3772 |
| RGB | rgb(45, 55, 114) |
| HSL | hsl(231, 43%, 31%) |
| OKLCH | oklch(36.2% 0.101 273.1) |
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 #2D3772 | 11.04:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #2D3772 | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #2D3772 text on white | 11.04:1 | AAA | Lc 95.3 | Preferred for body text |
| #2D3772 text on black | 1.90:1 | Fails | Lc -7.3 | 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 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#B0BEF3
oklch(80.9% 0.077 273.1)
-
Step 400
400
#889BEC
oklch(70.8% 0.121 272.9)
-
Step 500
500
#6C7FE6
oklch(63% 0.155 273.3)
-
Step 600
600
#5566D4
oklch(55.5% 0.169 273)
-
Step 700
700
#4654B8
oklch(49.1% 0.157 273.2)
-
Step 800
800
#394595
oklch(42.6% 0.131 273.1)
-
Step 900
900 (this color)
#2D3772
oklch(36.2% 0.101 273.1)
-
Step 950
950
#1C2345
oklch(26.9% 0.064 272.7)
#2D3772 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) | #193F74 | 0.029 |
| Deuteranopia (no green cones) | #0D3971 | 0.032 |
| Tritanopia (no blue cones) | #00444F | 0.089 |
| Achromatopsia (no color) | #3C3C3C | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3772
#2D3772
oklch(36.2% 0.101 273.1)
- #4B3C00
#4B3C00
oklch(36.2% 0.074 93)
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 #2D3772, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.042
- Marine Blue #01386A ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.053
- Marine #042E60 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.063
- Cobalt #1E488F ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.072
Use #2D3772 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.