#284142
Closest named color: Onyx (#343A40). oklch(35.5% 0.031 199.1), rgb(40, 65, 66).
Aa
White text reads best on this color (10.90:1).
About this color
#284142 is a dark, muted teal or cyan. In OKLCH its lightness is 36%, its chroma 0.031 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.026 away. White text reads best on it, at 10.90:1.
| Hue family | Teals and cyans |
| Lightness | dark (36%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #284142 |
| RGB | rgb(40, 65, 66) |
| HSL | hsl(182, 25%, 21%) |
| OKLCH | oklch(35.5% 0.031 199.1) |
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 #284142 | 10.90:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #284142 | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #284142 text on white | 10.90:1 | AAA | Lc 95.2 | Preferred for body text |
| #284142 text on black | 1.92:1 | Fails | Lc -7.4 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D0DCDC
oklch(88.5% 0.013 196.9)
-
Step 300
300
#B0C5C6
oklch(80.8% 0.023 200.2)
-
Step 400
400
#86A8A9
oklch(70.7% 0.037 198.6)
-
Step 500
500
#679394
oklch(63.2% 0.048 197.8)
-
Step 600
600
#4E7D7F
oklch(55.7% 0.051 199.2)
-
Step 700
700
#3E696B
oklch(49% 0.048 199.5)
-
Step 800
800
#345657
oklch(42.8% 0.04 198.2)
-
Step 900
900 (this color)
#284142
oklch(35.5% 0.031 199.1)
-
Step 950
950
#1B292A
oklch(26.9% 0.019 201.6)
#284142 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) | #3E3F42 | 0.032 |
| Deuteranopia (no green cones) | #393B42 | 0.030 |
| Tritanopia (no blue cones) | #1E4341 | 0.013 |
| Achromatopsia (no color) | #3D3D3D | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284142
#284142
oklch(35.5% 0.031 199.1)
- #4B3635
#4B3635
oklch(35.6% 0.03 21.8)
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 #284142, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.026
- Charcoal Grey #3C4142 ΔE 0.029
- Charcoal #264653 ΔE 0.029
- Dark Blue Grey #1F3B4D ΔE 0.034
- Dark Teal #014D4E ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.043
- Midnight Green #073B4C ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.048
Use #284142 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.