#2B5153
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.8% 0.043 200), rgb(43, 81, 83).
Aa
White text reads best on this color (8.73:1).
About this color
#2B5153 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.043 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.008 away. White text reads best on it, at 8.73:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.40:1 |
| White text | 8.73:1 |
Values
| HEX | #2B5153 |
| RGB | rgb(43, 81, 83) |
| HSL | hsl(183, 32%, 25%) |
| OKLCH | oklch(40.8% 0.043 200) |
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 #2B5153 | 8.73:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #2B5153 | 2.40:1 | Fails | Lc 14.2 | Not readable |
| #2B5153 text on white | 8.73:1 | AAA | Lc 89.8 | Fine for body text |
| #2B5153 text on black | 2.40:1 | Fails | Lc -12.4 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AFC6C7
oklch(81% 0.025 199.9)
-
Step 400
400
#83A9AB
oklch(70.8% 0.041 200.3)
-
Step 500
500
#639396
oklch(63% 0.052 200.9)
-
Step 600
600
#497E80
oklch(55.7% 0.057 198.8)
-
Step 700
700
#3A6A6C
oklch(49.1% 0.052 199.1)
-
Step 800
800 (this color)
#2B5153
oklch(40.8% 0.043 200)
-
Step 900
900
#2B4749
oklch(37.7% 0.034 201.6)
-
Step 950
950
#1A2A2B
oklch(27.1% 0.021 200.9)
#2B5153 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) | #4C4E53 | 0.044 |
| Deuteranopia (no green cones) | #454953 | 0.040 |
| Tritanopia (no blue cones) | #175351 | 0.018 |
| Achromatopsia (no color) | #4B4B4B | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5153
#2B5153
oklch(40.8% 0.043 200)
- #5F4040
#5F4040
oklch(40.7% 0.044 19.1)
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 #2B5153, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.008
- Deep Teal #00555A ΔE 0.026
- Dark Teal #014D4E ΔE 0.034
- Dark Blue Green #005249 ΔE 0.035
- Charcoal #264653 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.043
- Petrol #005F6A ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.052
Use #2B5153 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.