#2D3F6E
Closest named color: Twilight Blue (#0A437A). oklch(37.7% 0.084 266.6), rgb(45, 63, 110).
Aa
White text reads best on this color (10.25:1).
About this color
#2D3F6E is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.084 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 10.25:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #2D3F6E |
| RGB | rgb(45, 63, 110) |
| HSL | hsl(223, 42%, 30%) |
| OKLCH | oklch(37.7% 0.084 266.6) |
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 #2D3F6E | 10.25:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #2D3F6E | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #2D3F6E text on white | 10.25:1 | AAA | Lc 93.7 | Preferred for body text |
| #2D3F6E text on black | 2.04:1 | Fails | Lc -8.9 | 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
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F1
oklch(88.5% 0.035 267.6)
-
Step 300
300
#AEC0EA
oklch(80.8% 0.063 266.8)
-
Step 400
400
#849FE0
oklch(70.8% 0.1 266.6)
-
Step 500
500
#6686D7
oklch(63.2% 0.128 266.5)
-
Step 600
600
#4E6EC5
oklch(55.7% 0.14 266.7)
-
Step 700
700
#3F5BAA
oklch(49.1% 0.13 266.9)
-
Step 800
800
#344B8A
oklch(42.8% 0.108 266.8)
-
Step 900
900 (this color)
#2D3F6E
oklch(37.7% 0.084 266.6)
-
Step 950
950
#1A2540
oklch(26.9% 0.053 266.2)
#2D3F6E 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) | #2B4470 | 0.015 |
| Deuteranopia (no green cones) | #233E6D | 0.013 |
| Tritanopia (no blue cones) | #044951 | 0.075 |
| Achromatopsia (no color) | #414141 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3F6E
#2D3F6E
oklch(37.7% 0.084 266.6)
- #533E00
#533E00
oklch(37.6% 0.077 86.9)
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 #2D3F6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.044
- Marine Blue #01386A ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.053
- Light Navy #155084 ΔE 0.057
- Cobalt #1E488F ΔE 0.058
- Charcoal #264653 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.062
Use #2D3F6E 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.