#21897A
Closest named color: Dark Cyan (#008B8B). oklch(56.9% 0.094 180.8), rgb(33, 137, 122).
Aa
Black text reads best on this color (4.92:1).
About this color
#21897A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.094 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Cyan (#008B8B), ΔE 0.025 away. Black text reads best on it, at 4.92:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Dark Cyan (#008B8B) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #21897A |
| RGB | rgb(33, 137, 122) |
| HSL | hsl(171, 61%, 33%) |
| OKLCH | oklch(56.9% 0.094 180.8) |
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 #21897A | 4.26:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #21897A | 4.92:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #21897A text on white | 4.26:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #21897A text on black | 4.92:1 | AA | Lc -32.6 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#C9DEDA
oklch(88.4% 0.023 183.1)
-
Step 300
300
#A4CAC2
oklch(80.9% 0.042 181)
-
Step 400
400
#70AFA3
oklch(70.8% 0.067 180.9)
-
Step 500
500
#449B8C
oklch(63.2% 0.087 180.4)
-
Step 600
600 (this color)
#21897A
oklch(56.9% 0.094 180.8)
-
Step 700
700
#067163
oklch(49.2% 0.088 180.1)
-
Step 800
800
#0F5C51
oklch(42.8% 0.072 180.4)
-
Step 900
900
#174B43
oklch(37.6% 0.056 181.1)
-
Step 950
950
#102C27
oklch(27% 0.035 180.2)
#21897A 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) | #838179 | 0.099 |
| Deuteranopia (no green cones) | #75767B | 0.095 |
| Tritanopia (no blue cones) | #008C84 | 0.015 |
| Achromatopsia (no color) | #7A7A7A | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21897A
#21897A
oklch(56.9% 0.094 180.8)
- #A45F74
#A45F74
oklch(57% 0.093 0.9)
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 #21897A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Cyan #008B8B ΔE 0.025
- Teal #008080 ΔE 0.035
- Dusty Teal #4C9085 ΔE 0.042
- Viridian #1E9167 ΔE 0.043
- Teal Green #0A9396 ΔE 0.044
- Bluegreen #017A79 ΔE 0.050
- Sea Green #2E8B57 ΔE 0.053
- Blue Green #0F9B8E ΔE 0.054
Use #21897A 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.