#243140
Closest named color: Gunmetal (#293241). oklch(30.8% 0.032 252.4), rgb(36, 49, 64).
Aa
White text reads best on this color (13.22:1).
About this color
#243140 is a dark, muted blue. In OKLCH its lightness is 31%, its chroma 0.032 and its hue 252°. 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 13.22:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.58:1 |
| White text | 13.22:1 |
Values
| HEX | #243140 |
| RGB | rgb(36, 49, 64) |
| HSL | hsl(212, 28%, 20%) |
| OKLCH | oklch(30.8% 0.032 252.4) |
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 #243140 | 13.22:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #243140 | 1.58:1 | Fails | Lc 0.0 | Not readable |
| #243140 text on white | 13.22:1 | AAA | Lc 99.5 | Preferred for body text |
| #243140 text on black | 1.58:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#CFDAE7
oklch(88.4% 0.022 252.5)
-
Step 300
300
#AFC3D9
oklch(80.9% 0.038 250.8)
-
Step 400
400
#85A4C6
oklch(70.8% 0.061 251)
-
Step 500
500
#678DB8
oklch(63.2% 0.078 252.1)
-
Step 600
600
#4E76A4
oklch(55.6% 0.085 252.7)
-
Step 700
700
#3E638D
oklch(49.1% 0.08 252.6)
-
Step 800
800
#345172
oklch(42.7% 0.065 252.5)
-
Step 900
900
#2D435C
oklch(37.6% 0.051 252.3)
-
Step 950
950 (this color)
#243140
oklch(30.8% 0.032 252.4)
#243140 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) | #2B3141 | 0.011 |
| Deuteranopia (no green cones) | #282F40 | 0.009 |
| Tritanopia (no blue cones) | #1A3436 | 0.028 |
| Achromatopsia (no color) | #303030 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243140
#243140
oklch(30.8% 0.032 252.4)
- #3A2D1D
#3A2D1D
oklch(30.7% 0.033 71.9)
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 #243140, 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 0.018
- Dark Blue Grey #1F3B4D ΔE 0.035
- Midnight Green #073B4C ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.041
- Oxford Blue #1B263B ΔE 0.041
- Onyx #343A40 ΔE 0.042
- Dark #1B2431 ΔE 0.051
Use #243140 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.