#2B5F63
Closest named color: Petrol (#005F6A). oklch(45.2% 0.056 202.1), rgb(43, 95, 99).
Aa
White text reads best on this color (7.19:1).
About this color
#2B5F63 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.056 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.023 away. White text reads best on it, at 7.19:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.91:1 |
| White text | 7.19:1 |
Values
| HEX | #2B5F63 |
| RGB | rgb(43, 95, 99) |
| HSL | hsl(184, 39%, 28%) |
| OKLCH | oklch(45.2% 0.056 202.1) |
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 #2B5F63 | 7.19:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #2B5F63 | 2.91:1 | Fails | Lc 19.2 | Dividers and decoration only |
| #2B5F63 text on white | 7.19:1 | AAA | Lc 84.8 | Fine for body text |
| #2B5F63 text on black | 2.91:1 | Fails | Lc -17.2 | Dividers and decoration only |
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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#A9C7CA
oklch(80.8% 0.033 203.9)
-
Step 400
400
#7AABAE
oklch(70.8% 0.052 200.8)
-
Step 500
500
#55969B
oklch(63.2% 0.067 202)
-
Step 600
600
#378085
oklch(55.6% 0.072 201.4)
-
Step 700
700
#296C71
oklch(49.1% 0.067 202.1)
-
Step 800
800 (this color)
#2B5F63
oklch(45.2% 0.056 202.1)
-
Step 900
900
#23484B
oklch(37.6% 0.043 202.4)
-
Step 950
950
#152A2C
oklch(26.8% 0.027 203.5)
#2B5F63 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) | #585B63 | 0.056 |
| Deuteranopia (no green cones) | #4F5463 | 0.052 |
| Tritanopia (no blue cones) | #006260 | 0.024 |
| Achromatopsia (no color) | #575757 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5F63
#2B5F63
oklch(45.2% 0.056 202.1)
- #724948
#724948
oklch(45.2% 0.056 21.1)
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 #2B5F63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.023
- Dark Green Blue #1F6357 ΔE 0.029
- Dark Aqua #05696B ΔE 0.032
- Deep Teal #00555A ΔE 0.045
- YInMn Blue #415A77 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.052
- Slate #516572 ΔE 0.056
- Dark Aquamarine #017371 ΔE 0.060
Use #2B5F63 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.