#2B6366
Closest named color: Dark Aqua (#05696B). oklch(46.4% 0.059 200.1), rgb(43, 99, 102).
Aa
White text reads best on this color (6.81:1).
About this color
#2B6366 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.059 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.023 away. White text reads best on it, at 6.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.07:1 |
| White text | 6.81:1 |
Values
| HEX | #2B6366 |
| RGB | rgb(43, 99, 102) |
| HSL | hsl(183, 41%, 28%) |
| OKLCH | oklch(46.4% 0.059 200.1) |
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 #2B6366 | 6.81:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #2B6366 | 3.07:1 | AA large text | Lc 20.7 | Dividers and decoration only |
| #2B6366 text on white | 6.81:1 | AA | Lc 83.4 | Fine for body text |
| #2B6366 text on black | 3.07:1 | AA large text | Lc -18.6 | 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 700.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CEDCDD
oklch(88.4% 0.015 202)
-
Step 300
300
#ACC7C8
oklch(81% 0.029 199.3)
-
Step 400
400
#7FAAAC
oklch(70.8% 0.046 199.7)
-
Step 500
500
#5E9497
oklch(63% 0.057 200.3)
-
Step 600
600
#427F82
oklch(55.7% 0.063 199.7)
-
Step 700
700 (this color)
#2B6366
oklch(46.4% 0.059 200.1)
-
Step 800
800
#2B5759
oklch(42.6% 0.049 199.4)
-
Step 900
900
#284849
oklch(37.7% 0.038 198.2)
-
Step 950
950
#182A2B
oklch(27% 0.024 200.3)
#2B6366 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) | #5C5F66 | 0.059 |
| Deuteranopia (no green cones) | #535866 | 0.055 |
| Tritanopia (no blue cones) | #006664 | 0.022 |
| Achromatopsia (no color) | #5B5B5B | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B6366
#2B6366
oklch(46.4% 0.059 200.1)
- #774C4B
#774C4B
oklch(46.5% 0.059 21)
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 #2B6366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.023
- Dark Green Blue #1F6357 ΔE 0.028
- Petrol #005F6A ΔE 0.028
- Dark Aquamarine #017371 ΔE 0.048
- Deep Turquoise #017374 ΔE 0.048
- Slate #516572 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.051
- Deep Teal #00555A ΔE 0.056
Use #2B6366 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.