#31579A
Closest named color: Denim Blue (#3B5B92). oklch(46.4% 0.117 260.9), rgb(49, 87, 154).
Aa
White text reads best on this color (7.09:1).
About this color
#31579A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.117 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.022 away. White text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.96:1 |
| White text | 7.09:1 |
Values
| HEX | #31579A |
| RGB | rgb(49, 87, 154) |
| HSL | hsl(218, 52%, 40%) |
| OKLCH | oklch(46.4% 0.117 260.9) |
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 #31579A | 7.09:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #31579A | 2.96:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #31579A text on white | 7.09:1 | AAA | Lc 84.3 | Fine for body text |
| #31579A text on black | 2.96:1 | Fails | Lc -17.6 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ACC2E6
oklch(81% 0.056 260.2)
-
Step 400
400
#80A1DA
oklch(70.6% 0.092 261.1)
-
Step 500
500
#6089D0
oklch(63.1% 0.117 260.8)
-
Step 600
600
#4772BD
oklch(55.7% 0.126 260.8)
-
Step 700
700 (this color)
#31579A
oklch(46.4% 0.117 260.9)
-
Step 800
800
#2F4E84
oklch(42.8% 0.097 260.8)
-
Step 900
900
#2A416A
oklch(37.7% 0.076 261.3)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#31579A 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) | #375D9D | 0.019 |
| Deuteranopia (no green cones) | #265499 | 0.015 |
| Tritanopia (no blue cones) | #006671 | 0.095 |
| Achromatopsia (no color) | #585858 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31579A
#31579A
oklch(46.4% 0.117 260.9)
- #745200
#745200
oklch(46.3% 0.096 80.9)
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 #31579A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.022
- Dusk Blue #26538D ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.033
- Dusky Blue #475F94 ΔE 0.039
- Twilight #4E518B ΔE 0.042
- Denim #3B638C ΔE 0.048
- Light Navy #155084 ΔE 0.048
- Cobalt #1E488F ΔE 0.051
Use #31579A 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.