#21616B
Closest named color: Petrol (#005F6A). oklch(45.7% 0.065 209.6), rgb(33, 97, 107).
Aa
White text reads best on this color (7.03:1).
About this color
#21616B is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.065 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.017 away. White text reads best on it, at 7.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.98:1 |
| White text | 7.03:1 |
Values
| HEX | #21616B |
| RGB | rgb(33, 97, 107) |
| HSL | hsl(188, 53%, 27%) |
| OKLCH | oklch(45.7% 0.065 209.6) |
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 #21616B | 7.03:1 | AAA | Lc -89.1 | Fine for body text |
| Black text on #21616B | 2.98:1 | Fails | Lc 19.9 | Dividers and decoration only |
| #21616B text on white | 7.03:1 | AAA | Lc 84.1 | Fine for body text |
| #21616B text on black | 2.98:1 | Fails | Lc -17.9 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE1
oklch(88.5% 0.021 211.8)
-
Step 300
300
#A5C8CE
oklch(80.9% 0.038 209.1)
-
Step 400
400
#72ABB5
oklch(70.5% 0.061 209.7)
-
Step 500
500
#4997A3
oklch(63.2% 0.078 208.7)
-
Step 600
600
#25818E
oklch(55.7% 0.085 208.8)
-
Step 700
700
#156D79
oklch(49.2% 0.079 209)
-
Step 800
800 (this color)
#21616B
oklch(45.7% 0.065 209.6)
-
Step 900
900
#1B4950
oklch(37.7% 0.051 208.9)
-
Step 950
950
#112B2F
oklch(27% 0.033 208.6)
#21616B 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) | #585D6C | 0.062 |
| Deuteranopia (no green cones) | #4D556B | 0.057 |
| Tritanopia (no blue cones) | #006664 | 0.026 |
| Achromatopsia (no color) | #595959 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21616B
#21616B
oklch(45.7% 0.065 209.6)
- #774941
#774941
oklch(45.6% 0.065 30.5)
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 #21616B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.017
- Dark Aqua #05696B ΔE 0.026
- Dark Green Blue #1F6357 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.046
- Deep Teal #00555A ΔE 0.049
- Deep Turquoise #017374 ΔE 0.054
- Dark Aquamarine #017371 ΔE 0.055
- Slate #516572 ΔE 0.055
Use #21616B 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.