#31475E
Closest named color: Dark Grey Blue (#29465B). oklch(39% 0.048 250.2), rgb(49, 71, 94).
Aa
White text reads best on this color (9.57:1).
About this color
#31475E is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.048 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.012 away. White text reads best on it, at 9.57:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.19:1 |
| White text | 9.57:1 |
Values
| HEX | #31475E |
| RGB | rgb(49, 71, 94) |
| HSL | hsl(211, 31%, 28%) |
| OKLCH | oklch(39% 0.048 250.2) |
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 #31475E | 9.57:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #31475E | 2.19:1 | Fails | Lc 11.8 | Not readable |
| #31475E text on white | 9.57:1 | AAA | Lc 92.1 | Preferred for body text |
| #31475E text on black | 2.19:1 | Fails | Lc -10.3 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE6
oklch(88.4% 0.02 252.9)
-
Step 300
300
#B0C3D8
oklch(80.9% 0.036 250.9)
-
Step 400
400
#86A4C4
oklch(70.8% 0.058 250.3)
-
Step 500
500
#678DB5
oklch(63.1% 0.074 250.3)
-
Step 600
600
#4E77A1
oklch(55.7% 0.08 250)
-
Step 700
700
#3F648A
oklch(49.2% 0.075 250.2)
-
Step 800
800
#345170
oklch(42.6% 0.062 251)
-
Step 900
900 (this color)
#31475E
oklch(39% 0.048 250.2)
-
Step 950
950
#1B2835
oklch(27.1% 0.03 249)
#31475E 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) | #3E485F | 0.019 |
| Deuteranopia (no green cones) | #38435E | 0.015 |
| Tritanopia (no blue cones) | #1F4C4F | 0.040 |
| Achromatopsia (no color) | #454545 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31475E
#31475E
oklch(39% 0.048 250.2)
- #564128
#564128
oklch(39.2% 0.048 70.5)
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 #31475E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.012
- Charcoal #264653 ΔE 0.024
- Dark Slate Gray #2F4F4F ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.052
- Dark Teal #014D4E ΔE 0.054
- Deep Teal #00555A ΔE 0.056
- Onyx #343A40 ΔE 0.057
Use #31475E 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.