#283145
Closest named color: Gunmetal (#293241). oklch(31.4% 0.038 265.6), rgb(40, 49, 69).
Aa
White text reads best on this color (12.99:1).
About this color
#283145 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.038 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.009 away. White text reads best on it, at 12.99:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.61:1 |
| White text | 12.99:1 |
Values
| HEX | #283145 |
| RGB | rgb(40, 49, 69) |
| HSL | hsl(221, 27%, 21%) |
| OKLCH | oklch(31.4% 0.038 265.6) |
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 #283145 | 12.99:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #283145 | 1.61:1 | Fails | Lc 0.0 | Not readable |
| #283145 text on white | 12.99:1 | AAA | Lc 99.2 | Preferred for body text |
| #283145 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D1D9EA
oklch(88.4% 0.025 265.6)
-
Step 300
300
#B3C1DF
oklch(81% 0.045 265.5)
-
Step 400
400
#8BA0CF
oklch(70.7% 0.073 265.9)
-
Step 500
500
#6F88C2
oklch(63.1% 0.093 266)
-
Step 600
600
#5771AE
oklch(55.5% 0.1 265.7)
-
Step 700
700
#475F96
oklch(49.2% 0.093 265.3)
-
Step 800
800
#3A4D79
oklch(42.5% 0.077 265.5)
-
Step 900
900
#324162
oklch(37.8% 0.06 265)
-
Step 950
950 (this color)
#283145
oklch(31.4% 0.038 265.6)
#283145 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) | #2A3246 | 0.005 |
| Deuteranopia (no green cones) | #273045 | 0.004 |
| Tritanopia (no blue cones) | #1F3538 | 0.034 |
| Achromatopsia (no color) | #313131 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283145
#283145
oklch(31.4% 0.038 265.6)
- #3A301A
#3A301A
oklch(31.4% 0.038 85.8)
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 #283145, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.009
- Space Cadet #2B2D42 ΔE 0.013
- Dark Blue Grey #1F3B4D ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.033
- Onyx #343A40 ΔE 0.040
- Midnight Green #073B4C ΔE 0.041
- Oxford Blue #1B263B ΔE 0.045
- Dark #1B2431 ΔE 0.057
Use #283145 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.