#2B374B
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.5% 0.039 260.4), rgb(43, 55, 75).
Aa
White text reads best on this color (11.99:1).
About this color
#2B374B is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.039 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.018 away. White text reads best on it, at 11.99:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.75:1 |
| White text | 11.99:1 |
Values
| HEX | #2B374B |
| RGB | rgb(43, 55, 75) |
| HSL | hsl(218, 27%, 23%) |
| OKLCH | oklch(33.5% 0.039 260.4) |
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 #2B374B | 11.99:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #2B374B | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #2B374B text on white | 11.99:1 | AAA | Lc 97.4 | Preferred for body text |
| #2B374B text on black | 1.75:1 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E4
oklch(88.4% 0.016 262.7)
-
Step 300
300
#B6C1D4
oklch(80.8% 0.029 261.5)
-
Step 400
400
#90A2BE
oklch(70.8% 0.046 259.2)
-
Step 500
500
#758AAE
oklch(63% 0.06 261.1)
-
Step 600
600
#5D749A
oklch(55.6% 0.065 260.3)
-
Step 700
700
#4D6183
oklch(49% 0.06 260.8)
-
Step 800
800
#3F4F6B
oklch(42.6% 0.051 261.4)
-
Step 900
900 (this color)
#2B374B
oklch(33.5% 0.039 260.4)
-
Step 950
950
#1F2733
oklch(27.1% 0.025 258.3)
#2B374B 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) | #30384C | 0.009 |
| Deuteranopia (no green cones) | #2D354B | 0.007 |
| Tritanopia (no blue cones) | #203B3E | 0.034 |
| Achromatopsia (no color) | #363636 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B374B
#2B374B
oklch(33.5% 0.039 260.4)
- #41351F
#41351F
oklch(33.6% 0.039 81.9)
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 #2B374B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.018
- Gunmetal #293241 ΔE 0.022
- Onyx #343A40 ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.030
- Space Cadet #2B2D42 ΔE 0.033
- Midnight Green #073B4C ΔE 0.035
- Charcoal #264653 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.049
Use #2B374B 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.