#2D3C49
Closest named color: Onyx (#343A40). oklch(34.9% 0.03 245), rgb(45, 60, 73).
Aa
White text reads best on this color (11.32:1).
About this color
#2D3C49 is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.030 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.017 away. White text reads best on it, at 11.32:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.85:1 |
| White text | 11.32:1 |
Values
| HEX | #2D3C49 |
| RGB | rgb(45, 60, 73) |
| HSL | hsl(208, 24%, 23%) |
| OKLCH | oklch(34.9% 0.03 245) |
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 #2D3C49 | 11.32:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #2D3C49 | 1.85:1 | Fails | Lc 7.8 | Not readable |
| #2D3C49 text on white | 11.32:1 | AAA | Lc 96.1 | Preferred for body text |
| #2D3C49 text on black | 1.85:1 | Fails | Lc 0.0 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B5C3CF
oklch(81% 0.023 243.9)
-
Step 400
400
#8EA3B6
oklch(70.6% 0.037 245.7)
-
Step 500
500
#728DA4
oklch(63.1% 0.046 244.3)
-
Step 600
600
#5B778F
oklch(55.7% 0.05 244.7)
-
Step 700
700
#4A647A
oklch(49.1% 0.047 244.5)
-
Step 800
800
#3D5163
oklch(42.6% 0.039 246)
-
Step 900
900 (this color)
#2D3C49
oklch(34.9% 0.03 245)
-
Step 950
950
#1F282F
oklch(27.1% 0.018 241.7)
#2D3C49 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) | #373C4A | 0.015 |
| Deuteranopia (no green cones) | #333949 | 0.013 |
| Tritanopia (no blue cones) | #243F40 | 0.025 |
| Achromatopsia (no color) | #3A3A3A | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3C49
#2D3C49
oklch(34.9% 0.03 245)
- #45372A
#45372A
oklch(34.8% 0.029 64.5)
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 #2D3C49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.020
- Charcoal #264653 ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.033
- Gunmetal #293241 ΔE 0.034
- Midnight Green #073B4C ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.044
Use #2D3C49 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.