#31659E
Closest named color: Dusky Blue (#475F94). oklch(49.9% 0.107 252.6), rgb(49, 101, 158).
Aa
White text reads best on this color (6.02:1).
About this color
#31659E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.107 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.028 away. White text reads best on it, at 6.02:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.48:1 |
| White text | 6.02:1 |
Values
| HEX | #31659E |
| RGB | rgb(49, 101, 158) |
| HSL | hsl(211, 53%, 41%) |
| OKLCH | oklch(49.9% 0.107 252.6) |
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 #31659E | 6.02:1 | AA | Lc -85.1 | Fine for body text |
| Black text on #31659E | 3.48:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #31659E text on white | 6.02:1 | AA | Lc 79.9 | Fine for body text |
| #31659E text on black | 3.48:1 | AA large text | Lc -22.0 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#A9C3E2
oklch(80.8% 0.052 253)
-
Step 400
400
#7BA4D3
oklch(70.7% 0.082 252.3)
-
Step 500
500
#588DC8
oklch(63.2% 0.106 252.2)
-
Step 600
600
#3D76B5
oklch(55.7% 0.115 252.6)
-
Step 700
700 (this color)
#31659E
oklch(49.9% 0.107 252.6)
-
Step 800
800
#28517E
oklch(42.8% 0.088 252.5)
-
Step 900
900
#254365
oklch(37.6% 0.069 252.8)
-
Step 950
950
#16283B
oklch(27.1% 0.043 250.9)
#31659E 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) | #4C68A0 | 0.031 |
| Deuteranopia (no green cones) | #3C5E9D | 0.021 |
| Tritanopia (no blue cones) | #00727A | 0.083 |
| Achromatopsia (no color) | #636363 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31659E
#31659E
oklch(49.9% 0.107 252.6)
- #875700
#875700
oklch(49.8% 0.106 72.4)
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 #31659E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.028
- Denim #3B638C ΔE 0.029
- Peacock Blue #016795 ΔE 0.030
- Denim Blue #3B5B92 ΔE 0.031
- Mid Blue #276AB3 ΔE 0.034
- French Blue #436BAD ΔE 0.035
- Muted Blue #3B719F ΔE 0.038
- Ocean Blue #03719C ΔE 0.039
Use #31659E 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.