#2D406C
Closest named color: Twilight Blue (#0A437A). oklch(37.8% 0.079 265.2), rgb(45, 64, 108).
Aa
White text reads best on this color (10.18:1).
About this color
#2D406C is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.079 and its hue 265°. 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 10.18:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.06:1 |
| White text | 10.18:1 |
Values
| HEX | #2D406C |
| RGB | rgb(45, 64, 108) |
| HSL | hsl(222, 41%, 30%) |
| OKLCH | oklch(37.8% 0.079 265.2) |
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 #2D406C | 10.18:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #2D406C | 2.06:1 | Fails | Lc 10.4 | Not readable |
| #2D406C text on white | 10.18:1 | AAA | Lc 93.5 | Preferred for body text |
| #2D406C text on black | 2.06:1 | Fails | Lc -9.0 | 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
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9F0
oklch(88.5% 0.033 266.9)
-
Step 300
300
#AEC1E8
oklch(81% 0.059 264.6)
-
Step 400
400
#84A0DD
oklch(70.8% 0.095 265.1)
-
Step 500
500
#6587D3
oklch(63.1% 0.121 264.9)
-
Step 600
600
#4D6FC0
oklch(55.6% 0.132 265.2)
-
Step 700
700
#3E5DA6
oklch(49.2% 0.123 264.9)
-
Step 800
800
#334C86
oklch(42.7% 0.101 264.9)
-
Step 900
900 (this color)
#2D406C
oklch(37.8% 0.079 265.2)
-
Step 950
950
#1A263F
oklch(27.1% 0.05 263.9)
#2D406C 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) | #2E446E | 0.012 |
| Deuteranopia (no green cones) | #263F6B | 0.010 |
| Tritanopia (no blue cones) | #074A50 | 0.073 |
| Achromatopsia (no color) | #414141 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D406C
#2D406C
oklch(37.8% 0.079 265.2)
- #553E00
#553E00
oklch(37.9% 0.078 84.8)
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 #2D406C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.039
- Marine Blue #01386A ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.053
- Charcoal #264653 ΔE 0.053
- Light Navy #155084 ΔE 0.057
- Dark Blue Grey #1F3B4D ΔE 0.059
- Cobalt #1E488F ΔE 0.060
Use #2D406C 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.