#2B666E
Closest named color: Dark Aqua (#05696B). oklch(47.5% 0.062 207.3), rgb(43, 102, 110).
Aa
White text reads best on this color (6.50:1).
About this color
#2B666E is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.062 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.021 away. White text reads best on it, at 6.50:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #2B666E |
| RGB | rgb(43, 102, 110) |
| HSL | hsl(187, 44%, 30%) |
| OKLCH | oklch(47.5% 0.062 207.3) |
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 #2B666E | 6.50:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #2B666E | 3.22:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #2B666E text on white | 6.50:1 | AA | Lc 82.1 | Fine for body text |
| #2B666E text on black | 3.22:1 | AA large text | Lc -19.8 | 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 700.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E4ECED
oklch(93.7% 0.009 205.9)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ABC6CA
oklch(80.8% 0.03 207.4)
-
Step 400
400
#7EA9B0
oklch(70.6% 0.047 208.6)
-
Step 500
500
#5B949C
oklch(63% 0.061 207.1)
-
Step 600
600
#3F7E87
oklch(55.5% 0.066 207.6)
-
Step 700
700 (this color)
#2B666E
oklch(47.5% 0.062 207.3)
-
Step 800
800
#29575D
oklch(42.7% 0.051 206.6)
-
Step 900
900
#26484C
oklch(37.8% 0.04 205.4)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#2B666E 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) | #5E626F | 0.061 |
| Deuteranopia (no green cones) | #545B6E | 0.055 |
| Tritanopia (no blue cones) | #006A68 | 0.027 |
| Achromatopsia (no color) | #5E5E5E | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B666E
#2B666E
oklch(47.5% 0.062 207.3)
- #7B4E49
#7B4E49
oklch(47.3% 0.062 26.6)
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 #2B666E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.021
- Petrol #005F6A ΔE 0.034
- Dark Green Blue #1F6357 ΔE 0.039
- Deep Turquoise #017374 ΔE 0.040
- Dark Aquamarine #017371 ΔE 0.041
- Slate #516572 ΔE 0.043
- YInMn Blue #415A77 ΔE 0.048
- Deep Aqua #08787F ΔE 0.054
Use #2B666E 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.