#31424E
Closest named color: Charcoal (#264653). oklch(36.9% 0.03 239.4), rgb(49, 66, 78).
Aa
White text reads best on this color (10.39:1).
About this color
#31424E is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.030 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.017 away. White text reads best on it, at 10.39:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.01:1 |
| White text | 10.39:1 |
Values
| HEX | #31424E |
| RGB | rgb(49, 66, 78) |
| HSL | hsl(205, 23%, 25%) |
| OKLCH | oklch(36.9% 0.03 239.4) |
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 #31424E | 10.39:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #31424E | 2.01:1 | Fails | Lc 9.8 | Not readable |
| #31424E text on white | 10.39:1 | AAA | Lc 94.1 | Preferred for body text |
| #31424E text on black | 2.01:1 | Fails | Lc -8.4 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE1
oklch(88.4% 0.013 244.3)
-
Step 300
300
#B4C3CE
oklch(80.9% 0.023 239.5)
-
Step 400
400
#8DA4B5
oklch(70.7% 0.036 240.1)
-
Step 500
500
#708EA3
oklch(63.1% 0.046 239)
-
Step 600
600
#58788E
oklch(55.7% 0.05 238.8)
-
Step 700
700
#486579
oklch(49.2% 0.047 239)
-
Step 800
800
#3B5262
oklch(42.6% 0.039 239.2)
-
Step 900
900 (this color)
#31424E
oklch(36.9% 0.03 239.4)
-
Step 950
950
#1E282F
oklch(27% 0.019 238.9)
#31424E 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) | #3D424F | 0.018 |
| Deuteranopia (no green cones) | #393E4E | 0.017 |
| Tritanopia (no blue cones) | #284546 | 0.023 |
| Achromatopsia (no color) | #404040 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31424E
#31424E
oklch(36.9% 0.03 239.4)
- #4C3C30
#4C3C30
oklch(37% 0.03 58.5)
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 #31424E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.017
- Dark Grey Blue #29465B ΔE 0.023
- Charcoal Grey #3C4142 ΔE 0.024
- Onyx #343A40 ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.035
- Dark Slate Gray #2F4F4F ΔE 0.043
- Dark Teal #014D4E ΔE 0.049
- Midnight Green #073B4C ΔE 0.050
Use #31424E 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.