#315F99
Closest named color: Denim Blue (#3B5B92). oklch(48.2% 0.107 255.3), rgb(49, 95, 153).
Aa
White text reads best on this color (6.50:1).
About this color
#315F99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.107 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.016 away. White text reads best on it, at 6.50:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.22:1 |
| White text | 6.50:1 |
Values
| HEX | #315F99 |
| RGB | rgb(49, 95, 153) |
| HSL | hsl(213, 51%, 40%) |
| OKLCH | oklch(48.2% 0.107 255.3) |
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 #315F99 | 6.50:1 | AA | Lc -87.1 | Fine for body text |
| Black text on #315F99 | 3.22:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #315F99 text on white | 6.50:1 | AA | Lc 82.0 | Fine for body text |
| #315F99 text on black | 3.22:1 | AA large text | Lc -19.9 | 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
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ABC3E2
oklch(80.9% 0.051 254.9)
-
Step 400
400
#7EA3D4
oklch(70.7% 0.083 255.6)
-
Step 500
500
#5C8CC8
oklch(63.1% 0.105 254.6)
-
Step 600
600
#4275B5
oklch(55.7% 0.114 255)
-
Step 700
700 (this color)
#315F99
oklch(48.2% 0.107 255.3)
-
Step 800
800
#2B507E
oklch(42.7% 0.088 254.9)
-
Step 900
900
#274366
oklch(37.8% 0.069 254.8)
-
Step 950
950
#17273B
oklch(26.9% 0.043 254.6)
#315F99 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) | #45639B | 0.026 |
| Deuteranopia (no green cones) | #365998 | 0.017 |
| Tritanopia (no blue cones) | #006C74 | 0.085 |
| Achromatopsia (no color) | #5E5E5E | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315F99
#315F99
oklch(48.2% 0.107 255.3)
- #7F5400
#7F5400
oklch(48.1% 0.102 74.8)
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 #315F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.016
- Dusky Blue #475F94 ΔE 0.025
- Denim #3B638C ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.030
- Peacock Blue #016795 ΔE 0.033
- Dusk Blue #26538D ΔE 0.041
- Mid Blue #276AB3 ΔE 0.047
- French Blue #436BAD ΔE 0.049
Use #315F99 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.