#2B4957
Closest named color: Charcoal (#264653). oklch(38.8% 0.043 229.3), rgb(43, 73, 87).
Aa
White text reads best on this color (9.57:1).
About this color
#2B4957 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.043 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.013 away. White text reads best on it, at 9.57:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #2B4957 |
| RGB | rgb(43, 73, 87) |
| HSL | hsl(199, 34%, 25%) |
| OKLCH | oklch(38.8% 0.043 229.3) |
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 #2B4957 | 9.57:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #2B4957 | 2.19:1 | Fails | Lc 11.9 | Not readable |
| #2B4957 text on white | 9.57:1 | AAA | Lc 92.1 | Preferred for body text |
| #2B4957 text on black | 2.19:1 | Fails | Lc -10.3 | 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
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDCE3
oklch(88.6% 0.018 229)
-
Step 300
300
#ACC5D2
oklch(80.9% 0.033 230.4)
-
Step 400
400
#80A7BB
oklch(70.7% 0.051 230.7)
-
Step 500
500
#5E91AA
oklch(63% 0.066 230.4)
-
Step 600
600
#437B95
oklch(55.5% 0.072 229.9)
-
Step 700
700
#34687F
oklch(49.1% 0.067 229.1)
-
Step 800
800
#2C5567
oklch(42.8% 0.055 228.5)
-
Step 900
900 (this color)
#2B4957
oklch(38.8% 0.043 229.3)
-
Step 950
950
#182931
oklch(27% 0.027 229.2)
#2B4957 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) | #424858 | 0.031 |
| Deuteranopia (no green cones) | #3C4357 | 0.028 |
| Tritanopia (no blue cones) | #164D4D | 0.032 |
| Achromatopsia (no color) | #454545 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4957
#2B4957
oklch(38.8% 0.043 229.3)
- #583E30
#583E30
oklch(38.9% 0.043 49.3)
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 #2B4957, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.013
- Dark Grey Blue #29465B ΔE 0.014
- Dark Slate Gray #2F4F4F ΔE 0.028
- Dark Teal #014D4E ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.040
- Deep Teal #00555A ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.050
- Dark Blue Green #005249 ΔE 0.052
Use #2B4957 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.