#284253
Closest named color: Charcoal (#264653). oklch(36.6% 0.043 238.3), rgb(40, 66, 83).
Aa
White text reads best on this color (10.52:1).
About this color
#284253 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.043 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.013 away. White text reads best on it, at 10.52:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.99:1 |
| White text | 10.52:1 |
Values
| HEX | #284253 |
| RGB | rgb(40, 66, 83) |
| HSL | hsl(204, 35%, 24%) |
| OKLCH | oklch(36.6% 0.043 238.3) |
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 #284253 | 10.52:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #284253 | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #284253 text on white | 10.52:1 | AAA | Lc 94.4 | Preferred for body text |
| #284253 text on black | 1.99:1 | Fails | Lc -8.2 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D4
oklch(80.9% 0.033 239.5)
-
Step 400
400
#83A6BE
oklch(70.8% 0.052 238.4)
-
Step 500
500
#6390AD
oklch(63.2% 0.066 237.5)
-
Step 600
600
#497999
oklch(55.5% 0.072 239.1)
-
Step 700
700
#3A6683
oklch(49.1% 0.068 239.1)
-
Step 800
800
#30536A
oklch(42.6% 0.056 238.8)
-
Step 900
900 (this color)
#284253
oklch(36.6% 0.043 238.3)
-
Step 950
950
#1A2832
oklch(26.9% 0.027 240.1)
#284253 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) | #3A4254 | 0.025 |
| Deuteranopia (no green cones) | #343D53 | 0.022 |
| Tritanopia (no blue cones) | #144648 | 0.033 |
| Achromatopsia (no color) | #3F3F3F | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284253
#284253
oklch(36.6% 0.043 238.3)
- #503927
#503927
oklch(36.6% 0.044 58.9)
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 #284253, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.013
- Dark Grey Blue #29465B ΔE 0.017
- Dark Blue Grey #1F3B4D ΔE 0.027
- Onyx #343A40 ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.038
- Midnight Green #073B4C ΔE 0.041
- Dark Teal #014D4E ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.048
Use #284253 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.