#224E59
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.8% 0.052 216.5), rgb(34, 78, 89).
Aa
White text reads best on this color (9.12:1).
About this color
#224E59 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.052 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 9.12:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.30:1 |
| White text | 9.12:1 |
Values
| HEX | #224E59 |
| RGB | rgb(34, 78, 89) |
| HSL | hsl(192, 45%, 24%) |
| OKLCH | oklch(39.8% 0.052 216.5) |
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 #224E59 | 9.12:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #224E59 | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #224E59 text on white | 9.12:1 | AAA | Lc 90.8 | Preferred for body text |
| #224E59 text on black | 2.30:1 | Fails | Lc -11.5 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A5C7D1
oklch(80.8% 0.039 217.5)
-
Step 400
400
#73ABBA
oklch(70.8% 0.062 216.4)
-
Step 500
500
#4B95A8
oklch(63% 0.079 216.8)
-
Step 600
600
#288094
oklch(55.7% 0.086 216.3)
-
Step 700
700
#186C7E
oklch(49.2% 0.08 216.1)
-
Step 800
800
#185866
oklch(42.7% 0.066 215.6)
-
Step 900
900 (this color)
#224E59
oklch(39.8% 0.052 216.5)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#224E59 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) | #474C5A | 0.046 |
| Deuteranopia (no green cones) | #3E4659 | 0.040 |
| Tritanopia (no blue cones) | #005251 | 0.029 |
| Achromatopsia (no color) | #484848 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #224E59
#224E59
oklch(39.8% 0.052 216.5)
- #603D33
#603D33
oklch(39.8% 0.052 36.7)
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 #224E59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Charcoal #264653 ΔE 0.025
- Deep Teal #00555A ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.028
- Dark Teal #014D4E ΔE 0.029
- Dark Blue Green #005249 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.052
- Petrol #005F6A ΔE 0.053
Use #224E59 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.