#31608B
Closest named color: Denim (#3B638C). oklch(47.6% 0.087 248.2), rgb(49, 96, 139).
Aa
White text reads best on this color (6.61:1).
About this color
#31608B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.087 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.015 away. White text reads best on it, at 6.61:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.17:1 |
| White text | 6.61:1 |
Values
| HEX | #31608B |
| RGB | rgb(49, 96, 139) |
| HSL | hsl(209, 48%, 37%) |
| OKLCH | oklch(47.6% 0.087 248.2) |
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 #31608B | 6.61:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #31608B | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #31608B text on white | 6.61:1 | AA | Lc 82.5 | Fine for body text |
| #31608B text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ACC4DB
oklch(81% 0.042 247.2)
-
Step 400
400
#80A5C9
oklch(70.8% 0.067 248.1)
-
Step 500
500
#5E8EBB
oklch(63.1% 0.086 247.8)
-
Step 600
600
#4477A7
oklch(55.5% 0.093 248.5)
-
Step 700
700 (this color)
#31608B
oklch(47.6% 0.087 248.2)
-
Step 800
800
#2D5275
oklch(42.8% 0.072 248.6)
-
Step 900
900
#28445E
oklch(37.7% 0.056 247.8)
-
Step 950
950
#182837
oklch(27% 0.035 247.7)
#31608B 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) | #4D628D | 0.033 |
| Deuteranopia (no green cones) | #41598A | 0.025 |
| Tritanopia (no blue cones) | #006A6F | 0.068 |
| Achromatopsia (no color) | #5D5D5D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31608B
#31608B
oklch(47.6% 0.087 248.2)
- #7C521F
#7C521F
oklch(47.5% 0.086 67.9)
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 #31608B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.015
- Light Navy Blue #2E5A88 ΔE 0.019
- Denim Blue #3B5B92 ΔE 0.023
- Peacock Blue #016795 ΔE 0.029
- Dusky Blue #475F94 ΔE 0.030
- YInMn Blue #415A77 ΔE 0.035
- Dusk Blue #26538D ΔE 0.043
- Dusk #4E5481 ΔE 0.045
Use #31608B 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.