#21829D
Closest named color: Teal Blue (#01889F). oklch(56.5% 0.094 221.3), rgb(33, 130, 157).
Aa
Black text reads best on this color (4.74:1).
About this color
#21829D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.094 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.018 away. Black text reads best on it, at 4.74:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #21829D |
| RGB | rgb(33, 130, 157) |
| HSL | hsl(193, 65%, 37%) |
| OKLCH | oklch(56.5% 0.094 221.3) |
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 #21829D | 4.42:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #21829D | 4.74:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #21829D text on white | 4.42:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #21829D text on black | 4.74:1 | AA | Lc -31.3 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A3C7D4
oklch(80.8% 0.043 221.8)
-
Step 400
400
#70ABBF
oklch(70.8% 0.068 221.4)
-
Step 500
500
#4595AF
oklch(63% 0.087 222.2)
-
Step 600
600 (this color)
#21829D
oklch(56.5% 0.094 221.3)
-
Step 700
700
#0A6B84
oklch(49% 0.088 222)
-
Step 800
800
#10586B
oklch(42.8% 0.073 220.7)
-
Step 900
900
#184857
oklch(37.6% 0.057 222.2)
-
Step 950
950
#102A33
oklch(26.9% 0.036 223.3)
#21829D 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) | #727F9E | 0.077 |
| Deuteranopia (no green cones) | #62739D | 0.068 |
| Tritanopia (no blue cones) | #008B8B | 0.046 |
| Achromatopsia (no color) | #787878 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21829D
#21829D
oklch(56.5% 0.094 221.3)
- #A46249
#A46249
oklch(56.4% 0.094 41.4)
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 #21829D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.018
- Ocean #017B92 ΔE 0.028
- Cerulean #457B9D ΔE 0.030
- Blue NCS #118AB2 ΔE 0.035
- Stormy Blue #507B9C ΔE 0.038
- Nice Blue #107AB0 ΔE 0.044
- Dull Blue #49759C ΔE 0.044
- Sea Blue #047495 ΔE 0.045
Use #21829D 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.