#315BC9
Closest named color: Warm Blue (#4B57DB). oklch(50.7% 0.178 264.9), rgb(49, 91, 201).
Aa
White text reads best on this color (6.05:1).
About this color
#315BC9 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.178 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.041 away. White text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.47:1 |
| White text | 6.05:1 |
Values
| HEX | #315BC9 |
| RGB | rgb(49, 91, 201) |
| HSL | hsl(223, 61%, 49%) |
| OKLCH | oklch(50.7% 0.178 264.9) |
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 #315BC9 | 6.05:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #315BC9 | 3.47:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #315BC9 text on white | 6.05:1 | AA | Lc 79.7 | Fine for body text |
| #315BC9 text on black | 3.47:1 | AA large text | Lc -22.1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9FA
oklch(88.5% 0.048 266)
-
Step 300
300
#A5C0F9
oklch(80.8% 0.086 264.8)
-
Step 400
400
#769EF6
oklch(70.8% 0.137 264.6)
-
Step 500
500
#5482F3
oklch(63.1% 0.177 265.1)
-
Step 600
600
#3A68E1
oklch(55.5% 0.191 265)
-
Step 700
700 (this color)
#315BC9
oklch(50.7% 0.178 264.9)
-
Step 800
800
#26479E
oklch(42.7% 0.147 265)
-
Step 900
900
#233D7E
oklch(37.8% 0.115 265)
-
Step 950
950
#14244A
oklch(27% 0.074 264.7)
#315BC9 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) | #006ACD | 0.040 |
| Deuteranopia (no green cones) | #005CC7 | 0.025 |
| Tritanopia (no blue cones) | #007689 | 0.140 |
| Achromatopsia (no color) | #636363 | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315BC9
#315BC9
oklch(50.7% 0.178 264.9)
- #805F00
#805F00
oklch(50.6% 0.104 84.8)
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 #315BC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.041
- Royal Blue #4169E1 ΔE 0.054
- Azul #1D5DEC ΔE 0.055
- Mid Blue #276AB3 ΔE 0.056
- Iris #6258C4 ΔE 0.061
- Neon Blue #4361EE ΔE 0.063
- Blue Blue #2242C7 ΔE 0.063
- French Blue #436BAD ΔE 0.069
Use #315BC9 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.