#31405C
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.052 262.4), rgb(49, 64, 92).
Aa
White text reads best on this color (10.40:1).
About this color
#31405C is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.052 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.021 away. White text reads best on it, at 10.40:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.01:1 |
| White text | 10.40:1 |
Values
| HEX | #31405C |
| RGB | rgb(49, 64, 92) |
| HSL | hsl(219, 30%, 28%) |
| OKLCH | oklch(37.1% 0.052 262.4) |
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 #31405C | 10.40:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #31405C | 2.01:1 | Fails | Lc 9.8 | Not readable |
| #31405C text on white | 10.40:1 | AAA | Lc 94.1 | Preferred for body text |
| #31405C text on black | 2.01:1 | Fails | Lc -8.5 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E6EAF2
oklch(93.6% 0.012 264.5)
-
Step 200
200
#D1D9E8
oklch(88.4% 0.022 263.2)
-
Step 300
300
#B3C1DB
oklch(80.9% 0.04 262.9)
-
Step 400
400
#8CA1C8
oklch(70.7% 0.062 262.7)
-
Step 500
500
#6F8ABB
oklch(63.2% 0.081 262)
-
Step 600
600
#5773A7
oklch(55.6% 0.088 262.2)
-
Step 700
700
#47608F
oklch(49% 0.082 262.4)
-
Step 800
800
#3B4F74
oklch(42.8% 0.067 262.2)
-
Step 900
900 (this color)
#31405C
oklch(37.1% 0.052 262.4)
-
Step 950
950
#1E2637
oklch(26.9% 0.034 264.8)
#31405C 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) | #36425D | 0.010 |
| Deuteranopia (no green cones) | #313E5B | 0.006 |
| Tritanopia (no blue cones) | #21464A | 0.047 |
| Achromatopsia (no color) | #404040 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31405C
#31405C
oklch(37.1% 0.052 262.4)
- #4E3D1E
#4E3D1E
oklch(37.1% 0.052 81.1)
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 #31405C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.021
- Charcoal #264653 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.047
- Onyx #343A40 ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.048
- Midnight Green #073B4C ΔE 0.055
- Twilight Blue #0A437A ΔE 0.058
Use #31405C 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.