#21797A
Closest named color: Bluegreen (#017A79). oklch(52.7% 0.08 196.1), rgb(33, 121, 122).
Aa
White text reads best on this color (5.14:1).
About this color
#21797A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.080 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.011 away. White text reads best on it, at 5.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.08:1 |
| White text | 5.14:1 |
Values
| HEX | #21797A |
| RGB | rgb(33, 121, 122) |
| HSL | hsl(181, 57%, 30%) |
| OKLCH | oklch(52.7% 0.08 196.1) |
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 #21797A | 5.14:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #21797A | 4.08:1 | AA large text | Lc 28.9 | Dividers and decoration only |
| #21797A text on white | 5.14:1 | AA | Lc 75.1 | Fine for body text |
| #21797A text on black | 4.08:1 | AA large text | Lc -26.6 | 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 600.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CBDDDD
oklch(88.4% 0.019 196.8)
-
Step 300
300
#A7C8C8
oklch(80.9% 0.035 196.5)
-
Step 400
400
#75ACAC
oklch(70.6% 0.058 195.9)
-
Step 500
500
#4E9798
oklch(63% 0.073 196.6)
-
Step 600
600 (this color)
#21797A
oklch(52.7% 0.08 196.1)
-
Step 700
700
#1D6E6F
oklch(49.2% 0.075 196.2)
-
Step 800
800
#1C595A
oklch(42.6% 0.061 196.7)
-
Step 900
900
#1E494A
oklch(37.6% 0.047 197.4)
-
Step 950
950
#132B2B
oklch(27% 0.03 195.5)
#21797A 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) | #71737A | 0.083 |
| Deuteranopia (no green cones) | #63697B | 0.078 |
| Tritanopia (no blue cones) | #007D79 | 0.015 |
| Achromatopsia (no color) | #6D6D6D | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21797A
#21797A
oklch(52.7% 0.08 196.1)
- #93575B
#93575B
oklch(52.6% 0.08 15.9)
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 #21797A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.011
- Deep Aqua #08787F ΔE 0.012
- Teal #008080 ΔE 0.021
- Deep Turquoise #017374 ΔE 0.024
- Dark Aquamarine #017371 ΔE 0.026
- Ocean #017B92 ΔE 0.037
- Sea Blue #047495 ΔE 0.051
- Dark Cyan #008B8B ΔE 0.053
Use #21797A 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.