#2B4E63
Closest named color: Dark Grey Blue (#29465B). oklch(40.7% 0.054 236.5), rgb(43, 78, 99).
Aa
White text reads best on this color (8.85:1).
About this color
#2B4E63 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.054 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.027 away. White text reads best on it, at 8.85:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #2B4E63 |
| RGB | rgb(43, 78, 99) |
| HSL | hsl(203, 39%, 28%) |
| OKLCH | oklch(40.7% 0.054 236.5) |
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 #2B4E63 | 8.85:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #2B4E63 | 2.37:1 | Fails | Lc 13.8 | Not readable |
| #2B4E63 text on white | 8.85:1 | AAA | Lc 90.1 | Preferred for body text |
| #2B4E63 text on black | 2.37:1 | Fails | Lc -12.1 | 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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE3
oklch(88.5% 0.017 236.7)
-
Step 300
300
#AEC4D3
oklch(80.8% 0.032 237.7)
-
Step 400
400
#83A6BC
oklch(70.7% 0.05 236)
-
Step 500
500
#6390AC
oklch(63.2% 0.065 236.5)
-
Step 600
600
#497A97
oklch(55.7% 0.07 235.9)
-
Step 700
700
#3A6681
oklch(49% 0.065 237.1)
-
Step 800
800 (this color)
#2B4E63
oklch(40.7% 0.054 236.5)
-
Step 900
900
#2B4555
oklch(37.6% 0.042 236.5)
-
Step 950
950
#1A2932
oklch(27.2% 0.026 235.4)
#2B4E63 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) | #444D64 | 0.032 |
| Deuteranopia (no green cones) | #3D4863 | 0.028 |
| Tritanopia (no blue cones) | #075355 | 0.042 |
| Achromatopsia (no color) | #4A4A4A | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4E63
#2B4E63
oklch(40.7% 0.054 236.5)
- #60422C
#60422C
oklch(40.7% 0.054 56.8)
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 #2B4E63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.027
- Charcoal #264653 ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.036
- Deep Teal #00555A ΔE 0.040
- Dark Teal #014D4E ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.053
- Petrol #005F6A ΔE 0.054
- YInMn Blue #415A77 ΔE 0.055
Use #2B4E63 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.