#315FD3
Closest named color: Warm Blue (#4B57DB). oklch(52.3% 0.186 264.4), rgb(49, 95, 211).
Aa
White text reads best on this color (5.66:1).
About this color
#315FD3 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.186 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.033 away. White text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.70:1 |
| White text | 5.66:1 |
Values
| HEX | #315FD3 |
| RGB | rgb(49, 95, 211) |
| HSL | hsl(223, 65%, 51%) |
| OKLCH | oklch(52.3% 0.186 264.4) |
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 #315FD3 | 5.66:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #315FD3 | 3.70:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #315FD3 text on white | 5.66:1 | AA | Lc 77.8 | Fine for body text |
| #315FD3 text on black | 3.70:1 | AA large text | Lc -24.0 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9D9FB
oklch(88.4% 0.05 265.4)
-
Step 300
300
#A4C0FC
oklch(80.9% 0.091 265)
-
Step 400
400
#739DFA
oklch(70.6% 0.144 264.6)
-
Step 500
500
#5082F7
oklch(63.2% 0.183 264.4)
-
Step 600
600
#3567E6
oklch(55.5% 0.2 264.5)
-
Step 700
700 (this color)
#315FD3
oklch(52.3% 0.186 264.4)
-
Step 800
800
#2246A2
oklch(42.6% 0.155 264.5)
-
Step 900
900
#203C80
oklch(37.6% 0.12 264.5)
-
Step 950
950
#13244B
oklch(27% 0.076 264.2)
#315FD3 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) | #006FD7 | 0.041 |
| Deuteranopia (no green cones) | #0060D1 | 0.023 |
| Tritanopia (no blue cones) | #007C90 | 0.146 |
| Achromatopsia (no color) | #676767 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315FD3
#315FD3
oklch(52.3% 0.186 264.4)
- #866300
#866300
oklch(52.1% 0.107 84.3)
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 #315FD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.033
- Royal Blue #4169E1 ΔE 0.038
- Azul #1D5DEC ΔE 0.041
- Neon Blue #4361EE ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.053
- Mid Blue #276AB3 ΔE 0.061
- Iris #6258C4 ΔE 0.062
- Dark Periwinkle #665FD1 ΔE 0.064
Use #315FD3 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.