#283243
Closest named color: Gunmetal (#293241). oklch(31.6% 0.034 260.9), rgb(40, 50, 67).
Aa
White text reads best on this color (12.90:1).
About this color
#283243 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.034 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.004 away. White text reads best on it, at 12.90:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.62:1 |
| White text | 12.90:1 |
Values
| HEX | #283243 |
| RGB | rgb(40, 50, 67) |
| HSL | hsl(218, 25%, 21%) |
| OKLCH | oklch(31.6% 0.034 260.9) |
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 #283243 | 12.90:1 | AAA | Lc -102.4 | Preferred for body text |
| Black text on #283243 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #283243 text on white | 12.90:1 | AAA | Lc 99.1 | Preferred for body text |
| #283243 text on black | 1.62:1 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B2C1DB
oklch(80.8% 0.04 261.5)
-
Step 400
400
#8AA2C9
oklch(70.8% 0.063 260)
-
Step 500
500
#6D8ABB
oklch(63.1% 0.081 260.7)
-
Step 600
600
#5573A7
oklch(55.5% 0.089 261)
-
Step 700
700
#46618F
oklch(49.2% 0.081 260.7)
-
Step 800
800
#394F74
oklch(42.7% 0.068 260.4)
-
Step 900
900
#31425E
oklch(37.7% 0.053 260.1)
-
Step 950
950 (this color)
#283243
oklch(31.6% 0.034 260.9)
#283243 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) | #2C3344 | 0.008 |
| Deuteranopia (no green cones) | #293043 | 0.007 |
| Tritanopia (no blue cones) | #203638 | 0.030 |
| Achromatopsia (no color) | #323232 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #283243
#283243
oklch(31.6% 0.034 260.9)
- #3B301E
#3B301E
oklch(31.6% 0.033 79.4)
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 #283243, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.004
- Space Cadet #2B2D42 ΔE 0.016
- Dark Blue Grey #1F3B4D ΔE 0.031
- Onyx #343A40 ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.036
- Midnight Green #073B4C ΔE 0.039
- Oxford Blue #1B263B ΔE 0.047
- Dark #1B2431 ΔE 0.058
Use #283243 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.