#284B49
Closest named color: Dark Slate Gray (#2F4F4F). oklch(38.6% 0.041 190.9), rgb(40, 75, 73).
Aa
White text reads best on this color (9.57:1).
About this color
#284B49 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.041 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.018 away. White text reads best on it, at 9.57:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #284B49 |
| RGB | rgb(40, 75, 73) |
| HSL | hsl(177, 30%, 23%) |
| OKLCH | oklch(38.6% 0.041 190.9) |
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 #284B49 | 9.57:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #284B49 | 2.19:1 | Fails | Lc 11.9 | Not readable |
| #284B49 text on white | 9.57:1 | AAA | Lc 92.1 | Preferred for body text |
| #284B49 text on black | 2.19:1 | Fails | Lc -10.3 | 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
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CDDDDC
oklch(88.5% 0.017 192.3)
-
Step 300
300
#ABC7C5
oklch(80.8% 0.03 191.3)
-
Step 400
400
#7DABA8
oklch(70.7% 0.049 191.1)
-
Step 500
500
#5A9692
oklch(63.1% 0.063 190.2)
-
Step 600
600
#3D807D
oklch(55.5% 0.068 191.5)
-
Step 700
700
#2F6C69
oklch(49% 0.063 191)
-
Step 800
800
#285856
oklch(42.6% 0.052 191.8)
-
Step 900
900 (this color)
#284B49
oklch(38.6% 0.041 190.9)
-
Step 950
950
#172B29
oklch(27.1% 0.026 187.7)
#284B49 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) | #474849 | 0.043 |
| Deuteranopia (no green cones) | #414349 | 0.041 |
| Tritanopia (no blue cones) | #184D4A | 0.014 |
| Achromatopsia (no color) | #454545 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284B49
#284B49
oklch(38.6% 0.041 190.9)
- #573B3E
#573B3E
oklch(38.5% 0.04 12)
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 #284B49, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.018
- Dark Teal #014D4E ΔE 0.025
- Charcoal #264653 ΔE 0.028
- Dark Blue Green #005249 ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.038
- Deep Teal #00555A ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.040
- Onyx #343A40 ΔE 0.054
Use #284B49 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.