#315BE4
Closest named color: Azul (#1D5DEC). oklch(52.9% 0.213 266), rgb(49, 91, 228).
Aa
White text reads best on this color (5.60:1).
About this color
#315BE4 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.213 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.017 away. White text reads best on it, at 5.60:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.74:1 |
| White text | 5.60:1 |
Values
| HEX | #315BE4 |
| RGB | rgb(49, 91, 228) |
| HSL | hsl(226, 77%, 54%) |
| OKLCH | oklch(52.9% 0.213 266) |
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 #315BE4 | 5.60:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #315BE4 | 3.74:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #315BE4 text on white | 5.60:1 | AA | Lc 77.3 | Fine for body text |
| #315BE4 text on black | 3.74:1 | AA large text | Lc -24.4 | 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 600.
-
Step 50
50
#F1F5FE
oklch(97% 0.013 266.7)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C9D9FD
oklch(88.5% 0.053 266.4)
-
Step 300
300
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#517FFE
oklch(63.1% 0.196 266)
-
Step 600
600 (this color)
#315BE4
oklch(52.9% 0.213 266)
-
Step 700
700
#2B52CF
oklch(49.2% 0.198 265.9)
-
Step 800
800
#2444A7
oklch(42.7% 0.164 265.9)
-
Step 900
900
#213B84
oklch(37.8% 0.127 265.8)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#315BE4 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) | #0070E9 | 0.050 |
| Deuteranopia (no green cones) | #0060E1 | 0.024 |
| Tritanopia (no blue cones) | #007E97 | 0.165 |
| Achromatopsia (no color) | #686868 | 0.213 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315BE4
#315BE4
oklch(52.9% 0.213 266)
- #876600
#876600
oklch(52.9% 0.108 86.3)
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 #315BE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.017
- Neon Blue #4361EE ΔE 0.029
- Warm Blue #4B57DB ΔE 0.030
- Royal Blue #4169E1 ΔE 0.040
- Bright Blue #0165FC ΔE 0.044
- Cerulean Blue #056EEE ΔE 0.046
- Electric Blue #0652FF ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.072
Use #315BE4 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.