#284E4C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.5% 0.044 191.1), rgb(40, 78, 76).
Aa
White text reads best on this color (9.19:1).
About this color
#284E4C is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.044 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.010 away. White text reads best on it, at 9.19:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #284E4C |
| RGB | rgb(40, 78, 76) |
| HSL | hsl(177, 32%, 23%) |
| OKLCH | oklch(39.5% 0.044 191.1) |
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 #284E4C | 9.19:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #284E4C | 2.28:1 | Fails | Lc 12.9 | Not readable |
| #284E4C text on white | 9.19:1 | AAA | Lc 91.1 | Preferred for body text |
| #284E4C text on black | 2.28:1 | Fails | Lc -11.3 | 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
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CCDDDC
oklch(88.4% 0.018 192.6)
-
Step 300
300
#A9C8C6
oklch(80.9% 0.033 191.7)
-
Step 400
400
#7AABA8
oklch(70.6% 0.052 191.3)
-
Step 500
500
#569793
oklch(63.2% 0.067 190.5)
-
Step 600
600
#38817E
oklch(55.6% 0.073 191.6)
-
Step 700
700
#296D6A
oklch(49.1% 0.068 191.1)
-
Step 800
800
#245956
oklch(42.7% 0.056 190.2)
-
Step 900
900 (this color)
#284E4C
oklch(39.5% 0.044 191.1)
-
Step 950
950
#152B2A
oklch(27% 0.028 191.9)
#284E4C 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) | #4A4B4C | 0.046 |
| Deuteranopia (no green cones) | #43464C | 0.042 |
| Tritanopia (no blue cones) | #16504D | 0.015 |
| Achromatopsia (no color) | #484848 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284E4C
#284E4C
oklch(39.5% 0.044 191.1)
- #5B3D40
#5B3D40
oklch(39.5% 0.043 12.6)
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 #284E4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.010
- Dark Teal #014D4E ΔE 0.026
- Dark Blue Green #005249 ΔE 0.028
- Deep Teal #00555A ΔE 0.031
- Charcoal #264653 ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.044
- Petrol #005F6A ΔE 0.062
Use #284E4C 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.