#31669F
Closest named color: Dusky Blue (#475F94). oklch(50.2% 0.107 252.2), rgb(49, 102, 159).
Aa
White text reads best on this color (5.94:1).
About this color
#31669F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.107 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.030 away. White text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #31669F |
| RGB | rgb(49, 102, 159) |
| HSL | hsl(211, 53%, 41%) |
| OKLCH | oklch(50.2% 0.107 252.2) |
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 #31669F | 5.94:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #31669F | 3.53:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #31669F text on white | 5.94:1 | AA | Lc 79.5 | Fine for body text |
| #31669F text on black | 3.53:1 | AA large text | Lc -22.3 | 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
#3C76B5
oklch(55.6% 0.116 252.3)
-
Step 700
700 (this color)
#31669F
oklch(50.2% 0.107 252.2)
-
Step 800
800
#27517E
oklch(42.7% 0.089 252)
-
Step 900
900
#244365
oklch(37.6% 0.069 252.1)
-
Step 950
950
#16283B
oklch(27.1% 0.043 250.9)
#31669F 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) | #4D69A1 | 0.032 |
| Deuteranopia (no green cones) | #3D5F9E | 0.021 |
| Tritanopia (no blue cones) | #00737B | 0.083 |
| Achromatopsia (no color) | #646464 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31669F
#31669F
oklch(50.2% 0.107 252.2)
- #895800
#895800
oklch(50.2% 0.108 72.1)
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 #31669F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.030
- Denim #3B638C ΔE 0.030
- Peacock Blue #016795 ΔE 0.030
- Mid Blue #276AB3 ΔE 0.032
- French Blue #436BAD ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.034
- Muted Blue #3B719F ΔE 0.035
- Ocean Blue #03719C ΔE 0.037
Use #31669F 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.