#21818D
Closest named color: Teal (#008080). oklch(55.5% 0.086 207.5), rgb(33, 129, 141).
Aa
Black text reads best on this color (4.58:1).
About this color
#21818D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.086 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.024 away. Black text reads best on it, at 4.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.58:1 |
| White text | 4.57:1 |
Values
| HEX | #21818D |
| RGB | rgb(33, 129, 141) |
| HSL | hsl(187, 62%, 34%) |
| OKLCH | oklch(55.5% 0.086 207.5) |
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 #21818D | 4.57:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #21818D | 4.58:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #21818D text on white | 4.57:1 | AA | Lc 71.4 | Content text, not long reading |
| #21818D text on black | 4.58:1 | AA | Lc -30.2 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A4C8CD
oklch(80.8% 0.039 206.8)
-
Step 400
400
#71ACB5
oklch(70.7% 0.062 208)
-
Step 500
500
#4797A2
oklch(63.1% 0.079 207.4)
-
Step 600
600 (this color)
#21818D
oklch(55.5% 0.086 207.5)
-
Step 700
700
#106D78
oklch(49.1% 0.08 207.6)
-
Step 800
800
#145962
oklch(42.7% 0.066 208)
-
Step 900
900
#1A4950
oklch(37.7% 0.052 208.7)
-
Step 950
950
#112B2F
oklch(27% 0.033 208.6)
#21818D 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) | #757C8E | 0.083 |
| Deuteranopia (no green cones) | #66718D | 0.075 |
| Tritanopia (no blue cones) | #008785 | 0.027 |
| Achromatopsia (no color) | #757575 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21818D
#21818D
oklch(55.5% 0.086 207.5)
- #A05F57
#A05F57
oklch(55.6% 0.086 27.7)
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 #21818D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.024
- Ocean #017B92 ΔE 0.025
- Teal Blue #01889F ΔE 0.030
- Dark Cyan #008B8B ΔE 0.032
- Deep Aqua #08787F ΔE 0.034
- Bluegreen #017A79 ΔE 0.038
- Cerulean #457B9D ΔE 0.044
- Sea Blue #047495 ΔE 0.048
Use #21818D 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.