#2B4751
Closest named color: Charcoal (#264653). oklch(38% 0.038 222.6), rgb(43, 71, 81).
Aa
White text reads best on this color (9.89:1).
About this color
#2B4751 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.038 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.008 away. White text reads best on it, at 9.89:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.12:1 |
| White text | 9.89:1 |
Values
| HEX | #2B4751 |
| RGB | rgb(43, 71, 81) |
| HSL | hsl(196, 31%, 24%) |
| OKLCH | oklch(38% 0.038 222.6) |
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 #2B4751 | 9.89:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #2B4751 | 2.12:1 | Fails | Lc 11.0 | Not readable |
| #2B4751 text on white | 9.89:1 | AAA | Lc 92.9 | Preferred for body text |
| #2B4751 text on black | 2.12:1 | Fails | Lc -9.6 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CFDCE1
oklch(88.6% 0.016 222.7)
-
Step 300
300
#AEC5CE
oklch(80.9% 0.028 223.3)
-
Step 400
400
#82A7B5
oklch(70.6% 0.045 223)
-
Step 500
500
#6292A3
oklch(63.2% 0.058 222.2)
-
Step 600
600
#477C8E
oklch(55.7% 0.063 222)
-
Step 700
700
#386879
oklch(49% 0.059 223.2)
-
Step 800
800
#2F5562
oklch(42.7% 0.048 222.1)
-
Step 900
900 (this color)
#2B4751
oklch(38% 0.038 222.6)
-
Step 950
950
#19292F
oklch(26.9% 0.024 223.4)
#2B4751 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) | #414652 | 0.031 |
| Deuteranopia (no green cones) | #3B4151 | 0.028 |
| Tritanopia (no blue cones) | #1B4A4A | 0.024 |
| Achromatopsia (no color) | #434343 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4751
#2B4751
oklch(38% 0.038 222.6)
- #543C32
#543C32
oklch(38% 0.038 43.6)
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 #2B4751, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.008
- Dark Grey Blue #29465B ΔE 0.019
- Dark Slate Gray #2F4F4F ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.032
- Dark Teal #014D4E ΔE 0.035
- Dark Blue Grey #1F3B4D ΔE 0.044
- Onyx #343A40 ΔE 0.044
- Deep Teal #00555A ΔE 0.047
Use #2B4751 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.