#21778C
Closest named color: Ocean (#017B92). oklch(52.9% 0.085 218.1), rgb(33, 119, 140).
Aa
White text reads best on this color (5.14:1).
About this color
#21778C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.085 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.014 away. White text reads best on it, at 5.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.08:1 |
| White text | 5.14:1 |
Values
| HEX | #21778C |
| RGB | rgb(33, 119, 140) |
| HSL | hsl(192, 62%, 34%) |
| OKLCH | oklch(52.9% 0.085 218.1) |
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 #21778C | 5.14:1 | AA | Lc -80.5 | Fine for body text |
| Black text on #21778C | 4.08:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #21778C text on white | 5.14:1 | AA | Lc 75.1 | Fine for body text |
| #21778C 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CBDDE2
oklch(88.6% 0.021 216.2)
-
Step 300
300
#A6C7D1
oklch(80.9% 0.038 218.1)
-
Step 400
400
#75AABA
oklch(70.7% 0.06 218.7)
-
Step 500
500
#4D95A9
oklch(63.1% 0.078 218.2)
-
Step 600
600 (this color)
#21778C
oklch(52.9% 0.085 218.1)
-
Step 700
700
#1D6B7E
oklch(49.1% 0.078 218)
-
Step 800
800
#1B5767
oklch(42.6% 0.065 219.2)
-
Step 900
900
#1D4854
oklch(37.7% 0.051 218.9)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#21778C 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) | #6A738D | 0.073 |
| Deuteranopia (no green cones) | #5B698C | 0.065 |
| Tritanopia (no blue cones) | #007E7E | 0.037 |
| Achromatopsia (no color) | #6D6D6D | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21778C
#21778C
oklch(52.9% 0.085 218.1)
- #955A47
#955A47
oklch(53% 0.084 38.6)
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 #21778C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.014
- Sea Blue #047495 ΔE 0.021
- Deep Aqua #08787F ΔE 0.025
- Ocean Blue #03719C ΔE 0.037
- Bluegreen #017A79 ΔE 0.037
- Teal #008080 ΔE 0.039
- Metallic Blue #4F738E ΔE 0.040
- Deep Turquoise #017374 ΔE 0.042
Use #21778C 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.