#2D3D6B
Closest named color: Twilight Blue (#0A437A). oklch(37% 0.082 267.8), rgb(45, 61, 107).
Aa
White text reads best on this color (10.54:1).
About this color
#2D3D6B is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.082 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.038 away. White text reads best on it, at 10.54:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.54:1 |
Values
| HEX | #2D3D6B |
| RGB | rgb(45, 61, 107) |
| HSL | hsl(225, 41%, 30%) |
| OKLCH | oklch(37% 0.082 267.8) |
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 #2D3D6B | 10.54:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #2D3D6B | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #2D3D6B text on white | 10.54:1 | AAA | Lc 94.3 | Preferred for body text |
| #2D3D6B text on black | 1.99:1 | Fails | Lc -8.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#AFC0E9
oklch(80.9% 0.061 267.4)
-
Step 400
400
#869EDF
oklch(70.6% 0.099 268.3)
-
Step 500
500
#6885D5
oklch(63% 0.125 267.7)
-
Step 600
600
#516DC3
oklch(55.6% 0.137 268.2)
-
Step 700
700
#425BA8
oklch(49.1% 0.127 268)
-
Step 800
800
#364B88
oklch(42.8% 0.104 267.6)
-
Step 900
900 (this color)
#2D3D6B
oklch(37% 0.082 267.8)
-
Step 950
950
#1B2540
oklch(27% 0.052 267.5)
#2D3D6B 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) | #2A426D | 0.015 |
| Deuteranopia (no green cones) | #223C6A | 0.015 |
| Tritanopia (no blue cones) | #0A474E | 0.074 |
| Achromatopsia (no color) | #3F3F3F | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3D6B
#2D3D6B
oklch(37% 0.082 267.8)
- #513D00
#513D00
oklch(37.2% 0.076 87.7)
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 #2D3D6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.038
- Marine Blue #01386A ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.045
- Prussian Blue #1D3557 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.057
- Charcoal #264653 ΔE 0.057
- Light Navy #155084 ΔE 0.064
- Cobalt #1E488F ΔE 0.064
Use #2D3D6B 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.