#2B4154
Closest named color: Dark Grey Blue (#29465B). oklch(36.6% 0.043 245.4), rgb(43, 65, 84).
Aa
White text reads best on this color (10.56:1).
About this color
#2B4154 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.043 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.017 away. White text reads best on it, at 10.56:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #2B4154 |
| RGB | rgb(43, 65, 84) |
| HSL | hsl(208, 32%, 25%) |
| OKLCH | oklch(36.6% 0.043 245.4) |
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 #2B4154 | 10.56:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #2B4154 | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #2B4154 text on white | 10.56:1 | AAA | Lc 94.5 | Preferred for body text |
| #2B4154 text on black | 1.98:1 | Fails | Lc -8.1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#D0DBE4
oklch(88.6% 0.017 242.5)
-
Step 300
300
#B0C3D5
oklch(80.8% 0.033 246.8)
-
Step 400
400
#86A5BF
oklch(70.8% 0.051 243.9)
-
Step 500
500
#688EAF
oklch(63.1% 0.065 245.3)
-
Step 600
600
#4F789B
oklch(55.7% 0.071 245.3)
-
Step 700
700
#3F6584
oklch(49.2% 0.066 244.3)
-
Step 800
800
#34526C
oklch(42.7% 0.056 245.8)
-
Step 900
900 (this color)
#2B4154
oklch(36.6% 0.043 245.4)
-
Step 950
950
#1B2833
oklch(27% 0.027 244.6)
#2B4154 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) | #394155 | 0.020 |
| Deuteranopia (no green cones) | #343D54 | 0.017 |
| Tritanopia (no blue cones) | #1A4647 | 0.037 |
| Achromatopsia (no color) | #3F3F3F | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4154
#2B4154
oklch(36.6% 0.043 245.4)
- #4E3A26
#4E3A26
oklch(36.5% 0.042 65.8)
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 #2B4154, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.017
- Charcoal #264653 ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.028
- Onyx #343A40 ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.038
- Midnight Green #073B4C ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.047
- Dark Slate Gray #2F4F4F ΔE 0.051
Use #2B4154 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.