#315B9B
Closest named color: Denim Blue (#3B5B92). oklch(47.4% 0.114 258.6), rgb(49, 91, 155).
Aa
White text reads best on this color (6.77:1).
About this color
#315B9B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.114 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.017 away. White text reads best on it, at 6.77:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.10:1 |
| White text | 6.77:1 |
Values
| HEX | #315B9B |
| RGB | rgb(49, 91, 155) |
| HSL | hsl(216, 52%, 40%) |
| OKLCH | oklch(47.4% 0.114 258.6) |
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 #315B9B | 6.77:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #315B9B | 3.10:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #315B9B text on white | 6.77:1 | AA | Lc 83.1 | Fine for body text |
| #315B9B text on black | 3.10:1 | AA large text | Lc -18.8 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF5
oklch(93.5% 0.017 259.4)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ABC2E5
oklch(80.9% 0.056 258.7)
-
Step 400
400
#7FA2D8
oklch(70.7% 0.089 258.9)
-
Step 500
500
#5E8ACD
oklch(63.1% 0.113 258.6)
-
Step 600
600
#4473BA
oklch(55.6% 0.122 258.4)
-
Step 700
700 (this color)
#315B9B
oklch(47.4% 0.114 258.6)
-
Step 800
800
#2D4F82
oklch(42.8% 0.094 258.3)
-
Step 900
900
#284268
oklch(37.7% 0.073 257.8)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#315B9B 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) | #3E619E | 0.024 |
| Deuteranopia (no green cones) | #2D579A | 0.013 |
| Tritanopia (no blue cones) | #006A73 | 0.093 |
| Achromatopsia (no color) | #5B5B5B | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315B9B
#315B9B
oklch(47.4% 0.114 258.6)
- #795400
#795400
oklch(47.4% 0.098 79.1)
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 #315B9B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.017
- Dusky Blue #475F94 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.031
- Dusk Blue #26538D ΔE 0.034
- Denim #3B638C ΔE 0.039
- Peacock Blue #016795 ΔE 0.043
- Twilight #4E518B ΔE 0.045
- Mid Blue #276AB3 ΔE 0.051
Use #315B9B 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.