#21574E
Closest named color: Dark Blue Green (#005249). oklch(41.8% 0.059 180.6), rgb(33, 87, 78).
Aa
White text reads best on this color (8.27:1).
About this color
#21574E is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.059 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Green (#005249), ΔE 0.027 away. White text reads best on it, at 8.27:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Blue Green (#005249) |
| Black text | 2.53:1 |
| White text | 8.27:1 |
Values
| HEX | #21574E |
| RGB | rgb(33, 87, 78) |
| HSL | hsl(170, 45%, 24%) |
| OKLCH | oklch(41.8% 0.059 180.6) |
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 #21574E | 8.27:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #21574E | 2.53:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #21574E text on white | 8.27:1 | AAA | Lc 88.4 | Fine for body text |
| #21574E text on black | 2.53:1 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDDDA
oklch(88.4% 0.019 184.2)
-
Step 300
300
#A9C8C2
oklch(80.8% 0.034 182.4)
-
Step 400
400
#7AACA2
oklch(70.6% 0.055 180.8)
-
Step 500
500
#56988B
oklch(63.2% 0.071 179.8)
-
Step 600
600
#388275
oklch(55.6% 0.077 180.1)
-
Step 700
700
#296E63
oklch(49.1% 0.071 181)
-
Step 800
800 (this color)
#21574E
oklch(41.8% 0.059 180.6)
-
Step 900
900
#234A43
oklch(37.8% 0.046 180.6)
-
Step 950
950
#152B27
oklch(26.9% 0.029 181)
#21574E 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) | #53524E | 0.062 |
| Deuteranopia (no green cones) | #4B4C4F | 0.059 |
| Tritanopia (no blue cones) | #005954 | 0.016 |
| Achromatopsia (no color) | #4E4E4E | 0.059 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21574E
#21574E
oklch(41.8% 0.059 180.6)
- #673F4B
#673F4B
oklch(41.9% 0.058 0.5)
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 #21574E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Green #005249 ΔE 0.027
- Deep Teal #00555A ΔE 0.027
- Dark Slate Gray #2F4F4F ΔE 0.029
- Dark Green Blue #1F6357 ΔE 0.038
- Dark Teal #014D4E ΔE 0.041
- Petrol #005F6A ΔE 0.045
- Pine #2B5D34 ΔE 0.050
- Spruce #0A5F38 ΔE 0.052
Use #21574E 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.