#284B58
Closest named color: Charcoal (#264653). oklch(39.2% 0.046 224.2), rgb(40, 75, 88).
Aa
White text reads best on this color (9.38:1).
About this color
#284B58 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.046 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.017 away. White text reads best on it, at 9.38:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #284B58 |
| RGB | rgb(40, 75, 88) |
| HSL | hsl(196, 38%, 25%) |
| OKLCH | oklch(39.2% 0.046 224.2) |
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 #284B58 | 9.38:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #284B58 | 2.23:1 | Fails | Lc 12.4 | Not readable |
| #284B58 text on white | 9.38:1 | AAA | Lc 91.6 | Preferred for body text |
| #284B58 text on black | 2.23:1 | Fails | Lc -10.8 | 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 900.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE3
oklch(88.5% 0.02 225.7)
-
Step 300
300
#AAC6D1
oklch(80.9% 0.034 223.5)
-
Step 400
400
#7BA9BA
oklch(70.8% 0.055 222.8)
-
Step 500
500
#5793A9
oklch(63.1% 0.071 223.6)
-
Step 600
600
#3A7D95
oklch(55.6% 0.077 224.3)
-
Step 700
700
#2C697F
oklch(49% 0.071 224.9)
-
Step 800
800
#265667
oklch(42.7% 0.059 224)
-
Step 900
900 (this color)
#284B58
oklch(39.2% 0.046 224.2)
-
Step 950
950
#162A31
oklch(27.1% 0.029 222.4)
#284B58 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) | #444959 | 0.037 |
| Deuteranopia (no green cones) | #3D4458 | 0.033 |
| Tritanopia (no blue cones) | #0C4F4F | 0.031 |
| Achromatopsia (no color) | #464646 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284B58
#284B58
oklch(39.2% 0.046 224.2)
- #5B3E31
#5B3E31
oklch(39.3% 0.046 45.1)
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 #284B58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.017
- Dark Grey Blue #29465B ΔE 0.019
- Dark Slate Gray #2F4F4F ΔE 0.025
- Dark Teal #014D4E ΔE 0.034
- Deep Teal #00555A ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.045
- Dark Blue Green #005249 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.055
Use #284B58 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.