#224F55
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.9% 0.05 207), rgb(34, 79, 85).
Aa
White text reads best on this color (9.06:1).
About this color
#224F55 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.050 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.016 away. White text reads best on it, at 9.06:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #224F55 |
| RGB | rgb(34, 79, 85) |
| HSL | hsl(187, 43%, 23%) |
| OKLCH | oklch(39.9% 0.05 207) |
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 #224F55 | 9.06:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #224F55 | 2.31:1 | Fails | Lc 13.3 | Not readable |
| #224F55 text on white | 9.06:1 | AAA | Lc 90.7 | Preferred for body text |
| #224F55 text on black | 2.31:1 | Fails | Lc -11.6 | 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 900.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A5C8CD
oklch(80.9% 0.038 207)
-
Step 400
400
#73ACB4
oklch(70.8% 0.06 207)
-
Step 500
500
#4A97A1
oklch(63.2% 0.077 206.6)
-
Step 600
600
#27818C
oklch(55.6% 0.083 206.9)
-
Step 700
700
#176D77
oklch(49.1% 0.078 206.9)
-
Step 800
800
#185961
oklch(42.8% 0.064 207)
-
Step 900
900 (this color)
#224F55
oklch(39.9% 0.05 207)
-
Step 950
950
#122B2E
oklch(27.1% 0.031 205.7)
#224F55 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) | #494C55 | 0.049 |
| Deuteranopia (no green cones) | #414655 | 0.045 |
| Tritanopia (no blue cones) | #005251 | 0.023 |
| Achromatopsia (no color) | #494949 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #224F55
#224F55
oklch(39.9% 0.05 207)
- #603D39
#603D39
oklch(40% 0.05 26.7)
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 #224F55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.016
- Deep Teal #00555A ΔE 0.023
- Dark Teal #014D4E ΔE 0.025
- Charcoal #264653 ΔE 0.029
- Dark Blue Green #005249 ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.051
- Petrol #005F6A ΔE 0.053
Use #224F55 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.