#283A48
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.9% 0.034 242.4), rgb(40, 58, 72).
Aa
White text reads best on this color (11.73:1).
About this color
#283A48 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.034 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.013 away. White text reads best on it, at 11.73:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.78:1 |
| White text | 11.73:1 |
Values
| HEX | #283A48 |
| RGB | rgb(40, 58, 72) |
| HSL | hsl(206, 29%, 22%) |
| OKLCH | oklch(33.9% 0.034 242.4) |
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 #283A48 | 11.73:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #283A48 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #283A48 text on white | 11.73:1 | AAA | Lc 96.9 | Preferred for body text |
| #283A48 text on black | 1.78:1 | Fails | Lc 0.0 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D1DAE2
oklch(88.4% 0.015 244.7)
-
Step 300
300
#B3C3D0
oklch(80.9% 0.025 242.4)
-
Step 400
400
#8BA4B8
oklch(70.6% 0.041 242.4)
-
Step 500
500
#6E8EA7
oklch(63.2% 0.052 242.1)
-
Step 600
600
#567892
oklch(55.7% 0.056 241.9)
-
Step 700
700
#46657C
oklch(49.2% 0.052 241.2)
-
Step 800
800
#3A5265
oklch(42.7% 0.043 242.8)
-
Step 900
900 (this color)
#283A48
oklch(33.9% 0.034 242.4)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#283A48 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) | #343A49 | 0.018 |
| Deuteranopia (no green cones) | #303648 | 0.017 |
| Tritanopia (no blue cones) | #1C3D3F | 0.026 |
| Achromatopsia (no color) | #383838 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283A48
#283A48
oklch(33.9% 0.034 242.4)
- #453425
#453425
oklch(34% 0.035 62.7)
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 #283A48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.013
- Onyx #343A40 ΔE 0.022
- Gunmetal #293241 ΔE 0.026
- Midnight Green #073B4C ΔE 0.030
- Prussian Blue #1D3557 ΔE 0.038
- Charcoal #264653 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.043
Use #283A48 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.