#284E5D
Closest named color: Dark Grey Blue (#29465B). oklch(40.2% 0.05 225.8), rgb(40, 78, 93).
Aa
White text reads best on this color (8.98:1).
About this color
#284E5D is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.050 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 8.98:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #284E5D |
| RGB | rgb(40, 78, 93) |
| HSL | hsl(197, 40%, 26%) |
| OKLCH | oklch(40.2% 0.05 225.8) |
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 #284E5D | 8.98:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #284E5D | 2.33:1 | Fails | Lc 13.5 | Not readable |
| #284E5D text on white | 8.98:1 | AAA | Lc 90.5 | Preferred for body text |
| #284E5D text on black | 2.33:1 | Fails | Lc -11.8 | 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 800.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#AEC5CF
oklch(80.9% 0.029 225.8)
-
Step 400
400
#82A7B7
oklch(70.7% 0.047 226.2)
-
Step 500
500
#6191A5
oklch(63% 0.06 226.1)
-
Step 600
600
#477B90
oklch(55.5% 0.064 226)
-
Step 700
700
#38687B
oklch(49.1% 0.06 225.8)
-
Step 800
800 (this color)
#284E5D
oklch(40.2% 0.05 225.8)
-
Step 900
900
#2A4651
oklch(37.7% 0.039 224.9)
-
Step 950
950
#192930
oklch(27% 0.025 227.2)
#284E5D 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) | #464C5E | 0.039 |
| Deuteranopia (no green cones) | #3E475D | 0.033 |
| Tritanopia (no blue cones) | #045253 | 0.034 |
| Achromatopsia (no color) | #494949 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284E5D
#284E5D
oklch(40.2% 0.05 225.8)
- #5F4031
#5F4031
oklch(40.3% 0.05 46.7)
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 #284E5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Dark Slate Gray #2F4F4F ΔE 0.026
- Charcoal #264653 ΔE 0.028
- Deep Teal #00555A ΔE 0.032
- Dark Teal #014D4E ΔE 0.039
- Dark Blue Green #005249 ΔE 0.049
- Petrol #005F6A ΔE 0.053
- Charcoal Grey #3C4142 ΔE 0.054
Use #284E5D 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.