#284A50
Closest named color: Charcoal (#264653). oklch(38.6% 0.041 210.1), rgb(40, 74, 80).
Aa
White text reads best on this color (9.60:1).
About this color
#284A50 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.041 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.016 away. White text reads best on it, at 9.60:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.18:1 |
| White text | 9.60:1 |
Values
| HEX | #284A50 |
| RGB | rgb(40, 74, 80) |
| HSL | hsl(189, 33%, 24%) |
| OKLCH | oklch(38.6% 0.041 210.1) |
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 #284A50 | 9.60:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #284A50 | 2.18:1 | Fails | Lc 11.8 | Not readable |
| #284A50 text on white | 9.60:1 | AAA | Lc 92.2 | Preferred for body text |
| #284A50 text on black | 2.18:1 | Fails | Lc -10.2 | 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
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ABC6CC
oklch(80.8% 0.03 212.6)
-
Step 400
400
#7DA9B2
oklch(70.6% 0.049 211.6)
-
Step 500
500
#5A949E
oklch(63.1% 0.062 209.6)
-
Step 600
600
#3E7E89
oklch(55.5% 0.067 210.1)
-
Step 700
700
#2F6B75
oklch(49.2% 0.064 209.9)
-
Step 800
800
#28575F
oklch(42.7% 0.053 210)
-
Step 900
900 (this color)
#284A50
oklch(38.6% 0.041 210.1)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#284A50 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) | #454850 | 0.039 |
| Deuteranopia (no green cones) | #3E4350 | 0.035 |
| Tritanopia (no blue cones) | #144D4C | 0.022 |
| Achromatopsia (no color) | #454545 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284A50
#284A50
oklch(38.6% 0.041 210.1)
- #583C37
#583C37
oklch(38.7% 0.041 30.3)
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 #284A50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.016
- Dark Slate Gray #2F4F4F ΔE 0.020
- Dark Grey Blue #29465B ΔE 0.027
- Dark Teal #014D4E ΔE 0.027
- Charcoal Grey #3C4142 ΔE 0.037
- Deep Teal #00555A ΔE 0.038
- Dark Blue Green #005249 ΔE 0.040
- Onyx #343A40 ΔE 0.051
Use #284A50 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.