#2B5765
Closest named color: Petrol (#005F6A). oklch(43.1% 0.054 221), rgb(43, 87, 101).
Aa
White text reads best on this color (7.91:1).
About this color
#2B5765 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.054 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.030 away. White text reads best on it, at 7.91:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #2B5765 |
| RGB | rgb(43, 87, 101) |
| HSL | hsl(194, 40%, 28%) |
| OKLCH | oklch(43.1% 0.054 221) |
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 #2B5765 | 7.91:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #2B5765 | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #2B5765 text on white | 7.91:1 | AAA | Lc 87.3 | Fine for body text |
| #2B5765 text on black | 2.65:1 | Fails | Lc -14.8 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CDDCE1
oklch(88.5% 0.018 219.7)
-
Step 300
300
#ABC6CF
oklch(80.9% 0.032 219.9)
-
Step 400
400
#7EA8B7
oklch(70.6% 0.05 221.9)
-
Step 500
500
#5C93A5
oklch(63.2% 0.064 220.8)
-
Step 600
600
#407D90
oklch(55.7% 0.069 220.6)
-
Step 700
700
#31697B
oklch(49.1% 0.065 221.7)
-
Step 800
800 (this color)
#2B5765
oklch(43.1% 0.054 221)
-
Step 900
900
#274751
oklch(37.8% 0.041 220.1)
-
Step 950
950
#172A30
oklch(27.1% 0.027 220)
#2B5765 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) | #4F5566 | 0.045 |
| Deuteranopia (no green cones) | #464E65 | 0.041 |
| Tritanopia (no blue cones) | #005C5B | 0.036 |
| Achromatopsia (no color) | #515151 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5765
#2B5765
oklch(43.1% 0.054 221)
- #6A4639
#6A4639
oklch(43.1% 0.054 40.7)
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 #2B5765, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.030
- Deep Teal #00555A ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.038
- YInMn Blue #415A77 ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.054
- Dark Aqua #05696B ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.056
Use #2B5765 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.