#2D3E4B
Closest named color: Onyx (#343A40). oklch(35.5% 0.032 241.7), rgb(45, 62, 75).
Aa
White text reads best on this color (11.03:1).
About this color
#2D3E4B is a dark, muted blue. In OKLCH its lightness is 35%, its chroma 0.032 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.021 away. White text reads best on it, at 11.03:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #2D3E4B |
| RGB | rgb(45, 62, 75) |
| HSL | hsl(206, 25%, 24%) |
| OKLCH | oklch(35.5% 0.032 241.7) |
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 #2D3E4B | 11.03:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #2D3E4B | 1.90:1 | Fails | Lc 8.4 | Not readable |
| #2D3E4B text on white | 11.03:1 | AAA | Lc 95.5 | Preferred for body text |
| #2D3E4B text on black | 1.90:1 | 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
#D2DAE1
oklch(88.4% 0.013 244.3)
-
Step 300
300
#B4C3CF
oklch(80.9% 0.024 242)
-
Step 400
400
#8CA4B7
oklch(70.7% 0.039 242)
-
Step 500
500
#708EA5
oklch(63.2% 0.049 241.5)
-
Step 600
600
#587890
oklch(55.7% 0.052 241.3)
-
Step 700
700
#48647A
oklch(49% 0.048 242.6)
-
Step 800
800
#3B5263
oklch(42.7% 0.04 240.9)
-
Step 900
900 (this color)
#2D3E4B
oklch(35.5% 0.032 241.7)
-
Step 950
950
#1E282F
oklch(27% 0.019 238.9)
#2D3E4B 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) | #393E4C | 0.018 |
| Deuteranopia (no green cones) | #353B4B | 0.014 |
| Tritanopia (no blue cones) | #234142 | 0.025 |
| Achromatopsia (no color) | #3C3C3C | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D3E4B
#2D3E4B
oklch(35.5% 0.032 241.7)
- #48382B
#48382B
oklch(35.4% 0.031 60.6)
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 #2D3E4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.021
- Dark Blue Grey #1F3B4D ΔE 0.022
- Charcoal #264653 ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.032
- Midnight Green #073B4C ΔE 0.039
- Gunmetal #293241 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.047
Use #2D3E4B 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.