#224E55
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.6% 0.05 209.1), rgb(34, 78, 85).
Aa
White text reads best on this color (9.17:1).
About this color
#224E55 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.050 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.017 away. White text reads best on it, at 9.17:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #224E55 |
| RGB | rgb(34, 78, 85) |
| HSL | hsl(188, 43%, 23%) |
| OKLCH | oklch(39.6% 0.05 209.1) |
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 #224E55 | 9.17:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #224E55 | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #224E55 text on white | 9.17:1 | AAA | Lc 91.0 | Preferred for body text |
| #224E55 text on black | 2.28:1 | Fails | Lc -11.3 | 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
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A6C8CE
oklch(81% 0.037 209.5)
-
Step 400
400
#74ABB5
oklch(70.7% 0.059 210.1)
-
Step 500
500
#4C96A2
oklch(63% 0.076 209.2)
-
Step 600
600
#29808D
oklch(55.5% 0.082 209.3)
-
Step 700
700
#1A6C78
oklch(49% 0.077 209.6)
-
Step 800
800
#195862
oklch(42.6% 0.064 210.2)
-
Step 900
900 (this color)
#224E55
oklch(39.6% 0.05 209.1)
-
Step 950
950
#122B2F
oklch(27.1% 0.032 209)
#224E55 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) | #484B55 | 0.048 |
| Deuteranopia (no green cones) | #404555 | 0.044 |
| Tritanopia (no blue cones) | #005150 | 0.024 |
| Achromatopsia (no color) | #484848 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #224E55
#224E55
oklch(39.6% 0.05 209.1)
- #5F3C37
#5F3C37
oklch(39.6% 0.051 28.5)
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 #224E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.017
- Dark Teal #014D4E ΔE 0.025
- Deep Teal #00555A ΔE 0.025
- Charcoal #264653 ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.031
- Dark Blue Green #005249 ΔE 0.034
- Charcoal Grey #3C4142 ΔE 0.050
- Petrol #005F6A ΔE 0.055
Use #224E55 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.