#2B4058
Closest named color: Dark Grey Blue (#29465B). oklch(36.5% 0.05 252.4), rgb(43, 64, 88).
Aa
White text reads best on this color (10.62:1).
About this color
#2B4058 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.050 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.019 away. White text reads best on it, at 10.62:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.62:1 |
Values
| HEX | #2B4058 |
| RGB | rgb(43, 64, 88) |
| HSL | hsl(212, 34%, 26%) |
| OKLCH | oklch(36.5% 0.05 252.4) |
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 #2B4058 | 10.62:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #2B4058 | 1.97:1 | Fails | Lc 9.3 | Not readable |
| #2B4058 text on white | 10.62:1 | AAA | Lc 94.6 | Preferred for body text |
| #2B4058 text on black | 1.97:1 | Fails | Lc -8.0 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE7
oklch(88.5% 0.021 254.9)
-
Step 300
300
#B0C3D9
oklch(81% 0.037 252.1)
-
Step 400
400
#86A3C5
oklch(70.6% 0.06 252.7)
-
Step 500
500
#688CB7
oklch(63% 0.077 253.3)
-
Step 600
600
#4F76A3
oklch(55.6% 0.083 252.8)
-
Step 700
700
#40638B
oklch(49.1% 0.076 252.6)
-
Step 800
800
#355171
oklch(42.7% 0.063 252.5)
-
Step 900
900 (this color)
#2B4058
oklch(36.5% 0.05 252.4)
-
Step 950
950
#1B2736
oklch(26.9% 0.033 254.4)
#2B4058 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) | #374159 | 0.018 |
| Deuteranopia (no green cones) | #313C58 | 0.014 |
| Tritanopia (no blue cones) | #184548 | 0.043 |
| Achromatopsia (no color) | #3E3E3E | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4058
#2B4058
oklch(36.5% 0.05 252.4)
- #4F3A20
#4F3A20
oklch(36.5% 0.05 71.1)
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 #2B4058, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.019
- Charcoal #264653 ΔE 0.024
- Dark Blue Grey #1F3B4D ΔE 0.029
- Onyx #343A40 ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.042
- Midnight Green #073B4C ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.045
- Gunmetal #293241 ΔE 0.054
Use #2B4058 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.