#284F47
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.6% 0.047 178.9), rgb(40, 79, 71).
Aa
White text reads best on this color (9.13:1).
About this color
#284F47 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.047 and its hue 179°. 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 9.13:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.29:1 |
| White text | 9.13:1 |
Values
| HEX | #284F47 |
| RGB | rgb(40, 79, 71) |
| HSL | hsl(168, 33%, 23%) |
| OKLCH | oklch(39.6% 0.047 178.9) |
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 #284F47 | 9.13:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #284F47 | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #284F47 text on white | 9.13:1 | AAA | Lc 90.9 | Preferred for body text |
| #284F47 text on black | 2.29:1 | Fails | Lc -11.4 | 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
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDED9
oklch(88.6% 0.02 177.4)
-
Step 300
300
#A9C8C1
oklch(80.8% 0.035 180.2)
-
Step 400
400
#7AACA1
oklch(70.6% 0.056 179.4)
-
Step 500
500
#55988A
oklch(63.1% 0.072 178.8)
-
Step 600
600
#378274
oklch(55.5% 0.078 179.2)
-
Step 700
700
#296E61
oklch(49.1% 0.072 178.6)
-
Step 800
800
#245A4F
oklch(42.8% 0.06 177.8)
-
Step 900
900 (this color)
#284F47
oklch(39.6% 0.047 178.9)
-
Step 950
950
#152B27
oklch(26.9% 0.029 181)
#284F47 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) | #4C4B47 | 0.049 |
| Deuteranopia (no green cones) | #464648 | 0.048 |
| Tritanopia (no blue cones) | #18504D | 0.015 |
| Achromatopsia (no color) | #484848 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F47
#284F47
oklch(39.6% 0.047 178.9)
- #5C3C46
#5C3C46
oklch(39.6% 0.047 359.1)
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 #284F47, 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 Blue Green #005249 ΔE 0.024
- Dark Teal #014D4E ΔE 0.029
- Deep Teal #00555A ΔE 0.035
- Charcoal #264653 ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.053
- Evergreen #05472A ΔE 0.060
Use #284F47 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.