#284F44
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.5% 0.049 173.4), rgb(40, 79, 68).
Aa
White text reads best on this color (9.16:1).
About this color
#284F44 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.049 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.021 away. White text reads best on it, at 9.16:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #284F44 |
| RGB | rgb(40, 79, 68) |
| HSL | hsl(163, 33%, 23%) |
| OKLCH | oklch(39.5% 0.049 173.4) |
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 #284F44 | 9.16:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #284F44 | 2.29:1 | Fails | Lc 13.0 | Not readable |
| #284F44 text on white | 9.16:1 | AAA | Lc 91.0 | Preferred for body text |
| #284F44 text on black | 2.29:1 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#AAC9BE
oklch(81% 0.037 171.9)
-
Step 400
400
#7AAD9D
oklch(70.7% 0.059 173.1)
-
Step 500
500
#569885
oklch(63% 0.074 173.3)
-
Step 600
600
#38836F
oklch(55.7% 0.081 173.1)
-
Step 700
700
#296F5D
oklch(49.2% 0.076 173.2)
-
Step 800
800
#245A4C
oklch(42.7% 0.062 173.6)
-
Step 900
900 (this color)
#284F44
oklch(39.5% 0.049 173.4)
-
Step 950
950
#152B25
oklch(26.9% 0.03 174.4)
#284F44 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) | #4D4B44 | 0.051 |
| Deuteranopia (no green cones) | #464645 | 0.048 |
| Tritanopia (no blue cones) | #1A504C | 0.016 |
| Achromatopsia (no color) | #484848 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F44
#284F44
oklch(39.5% 0.049 173.4)
- #5B3B48
#5B3B48
oklch(39.4% 0.049 353.6)
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 #284F44, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.021
- Dark Blue Green #005249 ΔE 0.024
- Dark Teal #014D4E ΔE 0.031
- Deep Teal #00555A ΔE 0.038
- Charcoal #264653 ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.050
- Evergreen #05472A ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.057
Use #284F44 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.