#284F49
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.7% 0.046 182.8), rgb(40, 79, 73).
Aa
White text reads best on this color (9.11:1).
About this color
#284F49 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.046 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.014 away. White text reads best on it, at 9.11:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.30:1 |
| White text | 9.11:1 |
Values
| HEX | #284F49 |
| RGB | rgb(40, 79, 73) |
| HSL | hsl(171, 33%, 23%) |
| OKLCH | oklch(39.7% 0.046 182.8) |
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 #284F49 | 9.11:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #284F49 | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #284F49 text on white | 9.11:1 | AAA | Lc 90.9 | Preferred for body text |
| #284F49 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDDDA
oklch(88.4% 0.019 184.2)
-
Step 300
300
#A9C8C2
oklch(80.8% 0.034 182.4)
-
Step 400
400
#7AACA4
oklch(70.7% 0.054 183.7)
-
Step 500
500
#55988D
oklch(63.2% 0.071 182.2)
-
Step 600
600
#378277
oklch(55.6% 0.076 182.4)
-
Step 700
700
#286E64
oklch(49.1% 0.071 182.3)
-
Step 800
800
#235952
oklch(42.6% 0.058 183.8)
-
Step 900
900 (this color)
#284F49
oklch(39.7% 0.046 182.8)
-
Step 950
950
#152B28
oklch(27% 0.029 184.5)
#284F49 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) | #4C4B49 | 0.049 |
| Deuteranopia (no green cones) | #45464A | 0.047 |
| Tritanopia (no blue cones) | #17504D | 0.014 |
| Achromatopsia (no color) | #484848 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284F49
#284F49
oklch(39.7% 0.046 182.8)
- #5C3C44
#5C3C44
oklch(39.6% 0.047 3.1)
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 #284F49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.014
- Dark Blue Green #005249 ΔE 0.025
- Dark Teal #014D4E ΔE 0.028
- Deep Teal #00555A ΔE 0.033
- Charcoal #264653 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.050
- Dark Green Blue #1F6357 ΔE 0.062
Use #284F49 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.