#315B9D
Closest named color: Denim Blue (#3B5B92). oklch(47.5% 0.117 259.1), rgb(49, 91, 157).
Aa
White text reads best on this color (6.74:1).
About this color
#315B9D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.117 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.020 away. White text reads best on it, at 6.74:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.11:1 |
| White text | 6.74:1 |
Values
| HEX | #315B9D |
| RGB | rgb(49, 91, 157) |
| HSL | hsl(217, 52%, 40%) |
| OKLCH | oklch(47.5% 0.117 259.1) |
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 #315B9D | 6.74:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #315B9D | 3.11:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #315B9D text on white | 6.74:1 | AA | Lc 83.0 | Fine for body text |
| #315B9D text on black | 3.11:1 | AA large text | Lc -19.0 | 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
#ABC2E6
oklch(80.9% 0.057 259.3)
-
Step 400
400
#7EA2D9
oklch(70.7% 0.09 258.7)
-
Step 500
500
#5E8ACF
oklch(63.2% 0.115 259.1)
-
Step 600
600
#4472BC
oklch(55.5% 0.126 259.5)
-
Step 700
700 (this color)
#315B9D
oklch(47.5% 0.117 259.1)
-
Step 800
800
#2D4E83
oklch(42.6% 0.097 259.5)
-
Step 900
900
#284169
oklch(37.6% 0.076 259.4)
-
Step 950
950
#18273E
oklch(27.2% 0.048 258.7)
#315B9D 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) | #3C61A0 | 0.022 |
| Deuteranopia (no green cones) | #2B579C | 0.014 |
| Tritanopia (no blue cones) | #006A74 | 0.094 |
| Achromatopsia (no color) | #5B5B5B | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315B9D
#315B9D
oklch(47.5% 0.117 259.1)
- #7A5400
#7A5400
oklch(47.5% 0.099 78.4)
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 #315B9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.020
- Dusky Blue #475F94 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.035
- Dusk Blue #26538D ΔE 0.036
- Denim #3B638C ΔE 0.042
- Peacock Blue #016795 ΔE 0.044
- Twilight #4E518B ΔE 0.047
- Mid Blue #276AB3 ΔE 0.049
Use #315B9D 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.