#315BDD
Closest named color: Azul (#1D5DEC). oklch(52.3% 0.204 265.8), rgb(49, 91, 221).
Aa
White text reads best on this color (5.72:1).
About this color
#315BDD is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.204 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.026 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.204) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.67:1 |
| White text | 5.72:1 |
Values
| HEX | #315BDD |
| RGB | rgb(49, 91, 221) |
| HSL | hsl(225, 72%, 53%) |
| OKLCH | oklch(52.3% 0.204 265.8) |
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 #315BDD | 5.72:1 | AA | Lc -83.3 | Fine for body text |
| Black text on #315BDD | 3.67:1 | AA large text | Lc 26.1 | Dividers and decoration only |
| #315BDD text on white | 5.72:1 | AA | Lc 78.0 | Fine for body text |
| #315BDD text on black | 3.67:1 | AA large text | Lc -23.8 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFE
oklch(93.6% 0.029 266.4)
-
Step 200
200
#C8D9FE
oklch(88.5% 0.054 265.8)
-
Step 300
300
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#507FFF
oklch(63.1% 0.197 265.8)
-
Step 600
600
#3563F1
oklch(55.6% 0.219 265.7)
-
Step 700
700 (this color)
#315BDD
oklch(52.3% 0.204 265.8)
-
Step 800
800
#2243AA
oklch(42.7% 0.17 265.8)
-
Step 900
900
#203A86
oklch(37.7% 0.131 265.9)
-
Step 950
950
#13234F
oklch(27.1% 0.084 265.9)
#315BDD 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) | #006FE1 | 0.048 |
| Deuteranopia (no green cones) | #005FDA | 0.024 |
| Tritanopia (no blue cones) | #007C93 | 0.159 |
| Achromatopsia (no color) | #666666 | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315BDD
#315BDD
oklch(52.3% 0.204 265.8)
- #856400
#856400
oklch(52.2% 0.107 85.9)
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 #315BDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.026
- Warm Blue #4B57DB ΔE 0.027
- Neon Blue #4361EE ΔE 0.036
- Royal Blue #4169E1 ΔE 0.040
- Cerulean Blue #056EEE ΔE 0.051
- Bright Blue #0165FC ΔE 0.053
- Electric Blue #0652FF ΔE 0.060
- Dark Periwinkle #665FD1 ΔE 0.069
Use #315BDD 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.