#2B5F73
Closest named color: Petrol (#005F6A). oklch(45.9% 0.064 226), rgb(43, 95, 115).
Aa
White text reads best on this color (7.03:1).
About this color
#2B5F73 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.064 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.029 away. White text reads best on it, at 7.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #2B5F73 |
| RGB | rgb(43, 95, 115) |
| HSL | hsl(197, 46%, 31%) |
| OKLCH | oklch(45.9% 0.064 226) |
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 #2B5F73 | 7.03:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #2B5F73 | 2.98:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #2B5F73 text on white | 7.03:1 | AAA | Lc 84.2 | Fine for body text |
| #2B5F73 text on black | 2.98:1 | Fails | Lc -17.8 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A8C6D3
oklch(80.9% 0.037 225.9)
-
Step 400
400
#78A9BD
oklch(70.7% 0.06 225.3)
-
Step 500
500
#5393AD
oklch(63.1% 0.076 226.4)
-
Step 600
600
#347D98
oklch(55.5% 0.083 225.7)
-
Step 700
700
#266982
oklch(49% 0.077 226.5)
-
Step 800
800 (this color)
#2B5F73
oklch(45.9% 0.064 226)
-
Step 900
900
#214756
oklch(37.7% 0.05 226.3)
-
Step 950
950
#142A32
oklch(27.1% 0.032 223.6)
#2B5F73 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) | #545D74 | 0.049 |
| Deuteranopia (no green cones) | #4A5573 | 0.044 |
| Tritanopia (no blue cones) | #006565 | 0.041 |
| Achromatopsia (no color) | #595959 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5F73
#2B5F73
oklch(45.9% 0.064 226)
- #754C39
#754C39
oklch(45.8% 0.063 45.6)
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 #2B5F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.029
- YInMn Blue #415A77 ΔE 0.029
- Dark Aqua #05696B ΔE 0.041
- Light Navy Blue #2E5A88 ΔE 0.042
- Denim #3B638C ΔE 0.046
- Slate #516572 ΔE 0.049
- Dusty Grape #545775 ΔE 0.053
- Dark Green Blue #1F6357 ΔE 0.054
Use #2B5F73 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.