#21979E
Closest named color: Teal Green (#0A9396). oklch(61.9% 0.098 201.1), rgb(33, 151, 158).
Aa
Black text reads best on this color (5.98:1).
About this color
#21979E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 62%, its chroma 0.098 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Green (#0A9396), ΔE 0.018 away. Black text reads best on it, at 5.98:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Teal Green (#0A9396) |
| Black text | 5.98:1 |
| White text | 3.50:1 |
Values
| HEX | #21979E |
| RGB | rgb(33, 151, 158) |
| HSL | hsl(183, 65%, 37%) |
| OKLCH | oklch(61.9% 0.098 201.1) |
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 #21979E | 3.50:1 | AA large text | Lc -67.7 | Content text, not long reading |
| Black text on #21979E | 5.98:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #21979E text on white | 3.50:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #21979E text on black | 5.98:1 | AA | Lc -39.4 | 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 500.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C6DFE0
oklch(88.6% 0.027 199.6)
-
Step 300
300
#9DCACD
oklch(80.8% 0.047 201.3)
-
Step 400
400
#62AFB4
oklch(70.6% 0.077 201)
-
Step 500
500 (this color)
#21979E
oklch(61.9% 0.098 201.1)
-
Step 600
600
#00838A
oklch(55.5% 0.094 201.4)
-
Step 700
700
#006E74
oklch(49% 0.083 201.4)
-
Step 800
800
#005A5F
oklch(42.5% 0.072 201.4)
-
Step 900
900
#014B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#072C2F
oklch(26.9% 0.041 202.9)
#21979E 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) | #8B909F | 0.099 |
| Deuteranopia (no green cones) | #7A839F | 0.093 |
| Tritanopia (no blue cones) | #009D99 | 0.022 |
| Achromatopsia (no color) | #898989 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21979E
#21979E
oklch(61.9% 0.098 201.1)
- #B96D6C
#B96D6C
oklch(61.8% 0.097 21)
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 #21979E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Green #0A9396 ΔE 0.018
- Sea #3C9992 ΔE 0.024
- Blue Green #0F9B8E ΔE 0.032
- Persian Green #2A9D8F ΔE 0.034
- Dusty Teal #4C9085 ΔE 0.040
- Dark Cyan #008B8B ΔE 0.043
- Teal Blue #01889F ΔE 0.048
- Cadet Blue #5F9EA0 ΔE 0.051
Use #21979E 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.