#284256
Closest named color: Dark Grey Blue (#29465B). oklch(36.7% 0.047 242.7), rgb(40, 66, 86).
Aa
White text reads best on this color (10.47:1).
About this color
#284256 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.047 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.014 away. White text reads best on it, at 10.47:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.47:1 |
Values
| HEX | #284256 |
| RGB | rgb(40, 66, 86) |
| HSL | hsl(206, 37%, 25%) |
| OKLCH | oklch(36.7% 0.047 242.7) |
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 #284256 | 10.47:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #284256 | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #284256 text on white | 10.47:1 | AAA | Lc 94.2 | Preferred for body text |
| #284256 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE5
oklch(88.5% 0.02 240.8)
-
Step 300
300
#AEC4D6
oklch(80.9% 0.035 242.8)
-
Step 400
400
#82A5C1
oklch(70.6% 0.056 242.7)
-
Step 500
500
#628FB2
oklch(63.1% 0.072 242.7)
-
Step 600
600
#48799E
oklch(55.7% 0.079 242.6)
-
Step 700
700
#396587
oklch(49% 0.073 243.4)
-
Step 800
800
#30536E
oklch(42.8% 0.061 243.1)
-
Step 900
900 (this color)
#284256
oklch(36.7% 0.047 242.7)
-
Step 950
950
#192834
oklch(26.9% 0.03 243.3)
#284256 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) | #394257 | 0.023 |
| Deuteranopia (no green cones) | #333D56 | 0.020 |
| Tritanopia (no blue cones) | #114749 | 0.039 |
| Achromatopsia (no color) | #3F3F3F | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #284256
#284256
oklch(36.7% 0.047 242.7)
- #513924
#513924
oklch(36.6% 0.047 61.7)
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 #284256, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.014
- Charcoal #264653 ΔE 0.016
- Dark Blue Grey #1F3B4D ΔE 0.029
- Onyx #343A40 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.042
- Midnight Green #073B4C ΔE 0.043
- Prussian Blue #1D3557 ΔE 0.047
- Dark Teal #014D4E ΔE 0.049
Use #284256 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.