#2D3F63
Closest named color: Dark Grey Blue (#29465B). oklch(37% 0.067 263.3), rgb(45, 63, 99).
Aa
White text reads best on this color (10.48:1).
About this color
#2D3F63 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.067 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 10.48:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.48:1 |
Values
| HEX | #2D3F63 |
| RGB | rgb(45, 63, 99) |
| HSL | hsl(220, 38%, 28%) |
| OKLCH | oklch(37% 0.067 263.3) |
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 #2D3F63 | 10.48:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #2D3F63 | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #2D3F63 text on white | 10.48:1 | AAA | Lc 94.2 | Preferred for body text |
| #2D3F63 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0DAEC
oklch(88.6% 0.027 262.3)
-
Step 300
300
#B0C1E2
oklch(80.9% 0.05 263.7)
-
Step 400
400
#87A1D3
oklch(70.8% 0.079 263.2)
-
Step 500
500
#6989C7
oklch(63.2% 0.101 262.9)
-
Step 600
600
#5171B4
oklch(55.5% 0.111 263.8)
-
Step 700
700
#415F9B
oklch(49.1% 0.103 263)
-
Step 800
800
#364E7E
oklch(42.8% 0.085 263.1)
-
Step 900
900 (this color)
#2D3F63
oklch(37% 0.067 263.3)
-
Step 950
950
#1C263B
oklch(27% 0.042 264.3)
#2D3F63 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) | #314264 | 0.011 |
| Deuteranopia (no green cones) | #2B3D62 | 0.007 |
| Tritanopia (no blue cones) | #14474C | 0.060 |
| Achromatopsia (no color) | #3F3F3F | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3F63
#2D3F63
oklch(37% 0.067 263.3)
- #513C0F
#513C0F
oklch(37% 0.066 82.5)
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 #2D3F63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.030
- Charcoal #264653 ΔE 0.042
- Prussian Blue #1D3557 ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.044
- Twilight Blue #0A437A ΔE 0.046
- Marine Blue #01386A ΔE 0.049
- Midnight Green #073B4C ΔE 0.058
- Onyx #343A40 ΔE 0.059
Use #2D3F63 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.