#31507A
Closest named color: Light Navy (#155084). oklch(42.8% 0.079 256.4), rgb(49, 80, 122).
Aa
White text reads best on this color (8.20:1).
About this color
#31507A is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.079 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.028 away. White text reads best on it, at 8.20:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.55:1 |
| White text | 8.20:1 |
Values
| HEX | #31507A |
| RGB | rgb(49, 80, 122) |
| HSL | hsl(215, 43%, 34%) |
| OKLCH | oklch(42.8% 0.079 256.4) |
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 #31507A | 8.20:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #31507A | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #31507A text on white | 8.20:1 | AAA | Lc 88.2 | Fine for body text |
| #31507A text on black | 2.55:1 | Fails | Lc -13.9 | Not readable |
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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#AEC2DF
oklch(80.8% 0.047 257.6)
-
Step 400
400
#83A3CF
oklch(70.8% 0.074 256.4)
-
Step 500
500
#638BC2
oklch(63% 0.095 256.5)
-
Step 600
600
#4A75AF
oklch(55.7% 0.103 256.3)
-
Step 700
700
#3B6296
oklch(49.2% 0.095 256.1)
-
Step 800
800 (this color)
#31507A
oklch(42.8% 0.079 256.4)
-
Step 900
900
#2B4262
oklch(37.6% 0.062 256.8)
-
Step 950
950
#1A2739
oklch(27% 0.038 256.7)
#31507A 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) | #3F537C | 0.021 |
| Deuteranopia (no green cones) | #354C79 | 0.012 |
| Tritanopia (no blue cones) | #00595F | 0.069 |
| Achromatopsia (no color) | #4F4F4F | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31507A
#31507A
oklch(42.8% 0.079 256.4)
- #684813
#684813
oklch(42.7% 0.08 75.5)
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 #31507A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.031
- Dusk Blue #26538D ΔE 0.032
- Light Navy Blue #2E5A88 ΔE 0.034
- YInMn Blue #415A77 ΔE 0.040
- Dusk #4E5481 ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.050
- Twilight #4E518B ΔE 0.050
Use #31507A 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.