#21565A
Closest named color: Deep Teal (#00555A). oklch(42% 0.056 202.1), rgb(33, 86, 90).
Aa
White text reads best on this color (8.25:1).
About this color
#21565A is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.056 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.017 away. White text reads best on it, at 8.25:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.54:1 |
| White text | 8.25:1 |
Values
| HEX | #21565A |
| RGB | rgb(33, 86, 90) |
| HSL | hsl(184, 46%, 24%) |
| OKLCH | oklch(42% 0.056 202.1) |
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 #21565A | 8.25:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #21565A | 2.54:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #21565A text on white | 8.25:1 | AAA | Lc 88.3 | Fine for body text |
| #21565A text on black | 2.54:1 | Fails | Lc -13.8 | Not readable |
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 800.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CCDDDE
oklch(88.5% 0.018 201.1)
-
Step 300
300
#A9C7CA
oklch(80.8% 0.033 203.9)
-
Step 400
400
#7AABAF
oklch(70.8% 0.052 202.4)
-
Step 500
500
#55969B
oklch(63.2% 0.067 202)
-
Step 600
600
#378085
oklch(55.6% 0.072 201.4)
-
Step 700
700
#286C71
oklch(49.1% 0.068 202)
-
Step 800
800 (this color)
#21565A
oklch(42% 0.056 202.1)
-
Step 900
900
#23494B
oklch(37.8% 0.043 200)
-
Step 950
950
#152B2C
oklch(27.1% 0.028 199.4)
#21565A 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) | #50525A | 0.057 |
| Deuteranopia (no green cones) | #474C5A | 0.052 |
| Tritanopia (no blue cones) | #005957 | 0.020 |
| Achromatopsia (no color) | #4E4E4E | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21565A
#21565A
oklch(42% 0.056 202.1)
- #68413F
#68413F
oklch(42% 0.055 22.9)
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 #21565A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.017
- Dark Slate Gray #2F4F4F ΔE 0.025
- Petrol #005F6A ΔE 0.033
- Dark Blue Green #005249 ΔE 0.037
- Dark Teal #014D4E ΔE 0.040
- Dark Green Blue #1F6357 ΔE 0.045
- Charcoal #264653 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.053
Use #21565A 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.