#283143
Closest named color: Gunmetal (#293241). oklch(31.3% 0.035 263.9), rgb(40, 49, 67).
Aa
White text reads best on this color (13.03:1).
About this color
#283143 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.035 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.006 away. White text reads best on it, at 13.03:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.61:1 |
| White text | 13.03:1 |
Values
| HEX | #283143 |
| RGB | rgb(40, 49, 67) |
| HSL | hsl(220, 25%, 21%) |
| OKLCH | oklch(31.3% 0.035 263.9) |
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 #283143 | 13.03:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #283143 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #283143 text on white | 13.03:1 | AAA | Lc 99.3 | Preferred for body text |
| #283143 text on black | 1.61:1 | 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 950.
-
Step 50
50
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1D9E9
oklch(88.4% 0.024 264.4)
-
Step 300
300
#B3C1DC
oklch(80.9% 0.041 263.6)
-
Step 400
400
#8CA1CB
oklch(70.8% 0.066 264)
-
Step 500
500
#6F89BD
oklch(63.1% 0.084 263.7)
-
Step 600
600
#5872A9
oklch(55.6% 0.091 264.3)
-
Step 700
700
#486091
oklch(49.2% 0.084 263.7)
-
Step 800
800
#3B4E76
oklch(42.7% 0.071 264.2)
-
Step 900
900
#33415F
oklch(37.7% 0.055 264.7)
-
Step 950
950 (this color)
#283143
oklch(31.3% 0.035 263.9)
#283143 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) | #2B3244 | 0.006 |
| Deuteranopia (no green cones) | #283043 | 0.003 |
| Tritanopia (no blue cones) | #203537 | 0.032 |
| Achromatopsia (no color) | #313131 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283143
#283143
oklch(31.3% 0.035 263.9)
- #39301C
#39301C
oklch(31.3% 0.035 86.2)
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 #283143, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.006
- Space Cadet #2B2D42 ΔE 0.013
- Dark Blue Grey #1F3B4D ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.037
- Onyx #343A40 ΔE 0.039
- Midnight Green #073B4C ΔE 0.041
- Oxford Blue #1B263B ΔE 0.044
- Dark #1B2431 ΔE 0.056
Use #283143 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.