#31596E
Closest named color: YInMn Blue (#415A77). oklch(44.4% 0.057 233), rgb(49, 89, 110).
Aa
White text reads best on this color (7.54:1).
About this color
#31596E is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.057 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.025 away. White text reads best on it, at 7.54:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #31596E |
| RGB | rgb(49, 89, 110) |
| HSL | hsl(201, 38%, 31%) |
| OKLCH | oklch(44.4% 0.057 233) |
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 #31596E | 7.54:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #31596E | 2.78:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #31596E text on white | 7.54:1 | AAA | Lc 86.1 | Fine for body text |
| #31596E text on black | 2.78:1 | Fails | Lc -16.0 | Dividers and decoration only |
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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CEDCE3
oklch(88.6% 0.018 229)
-
Step 300
300
#ACC5D3
oklch(80.9% 0.034 232.3)
-
Step 400
400
#80A7BD
oklch(70.8% 0.053 233.2)
-
Step 500
500
#5E91AC
oklch(63.1% 0.068 232.4)
-
Step 600
600
#437B98
oklch(55.7% 0.074 232.8)
-
Step 700
700
#356781
oklch(49% 0.068 233.2)
-
Step 800
800 (this color)
#31596E
oklch(44.4% 0.057 233)
-
Step 900
900
#284655
oklch(37.7% 0.044 231.3)
-
Step 950
950
#182932
oklch(27% 0.028 232.3)
#31596E 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) | #4F586F | 0.038 |
| Deuteranopia (no green cones) | #46516E | 0.034 |
| Tritanopia (no blue cones) | #0A5F60 | 0.043 |
| Achromatopsia (no color) | #545454 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31596E
#31596E
oklch(44.4% 0.057 233)
- #6D4B35
#6D4B35
oklch(44.5% 0.057 53.6)
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 #31596E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.025
- Petrol #005F6A ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.043
- Dusty Grape #545775 ΔE 0.048
- Deep Sea Blue #015482 ΔE 0.050
- Deep Teal #00555A ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.054
- Dusk #4E5481 ΔE 0.054
Use #31596E 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.