#315AE1
Closest named color: Azul (#1D5DEC). oklch(52.5% 0.21 266.1), rgb(49, 90, 225).
Aa
White text reads best on this color (5.70:1).
About this color
#315AE1 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.210 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.021 away. White text reads best on it, at 5.70:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 3.68:1 |
| White text | 5.70:1 |
Values
| HEX | #315AE1 |
| RGB | rgb(49, 90, 225) |
| HSL | hsl(226, 75%, 54%) |
| OKLCH | oklch(52.5% 0.21 266.1) |
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 #315AE1 | 5.70:1 | AA | Lc -83.2 | Fine for body text |
| Black text on #315AE1 | 3.68:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #315AE1 text on white | 5.70:1 | AA | Lc 77.9 | Fine for body text |
| #315AE1 text on black | 3.68:1 | AA large text | Lc -23.9 | 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
#527FFD
oklch(63.1% 0.194 266.2)
-
Step 600
600 (this color)
#315AE1
oklch(52.5% 0.21 266.1)
-
Step 700
700
#2C52CD
oklch(49.1% 0.195 266)
-
Step 800
800
#2544A6
oklch(42.7% 0.162 266.1)
-
Step 900
900
#223B83
oklch(37.7% 0.125 266.1)
-
Step 950
950
#14234D
oklch(27% 0.08 266.3)
#315AE1 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) | #006FE5 | 0.050 |
| Deuteranopia (no green cones) | #005EDE | 0.024 |
| Tritanopia (no blue cones) | #007D95 | 0.164 |
| Achromatopsia (no color) | #666666 | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315AE1
#315AE1
oklch(52.5% 0.21 266.1)
- #866500
#866500
oklch(52.6% 0.108 86.1)
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 #315AE1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.021
- Warm Blue #4B57DB ΔE 0.028
- Neon Blue #4361EE ΔE 0.033
- Royal Blue #4169E1 ΔE 0.042
- Bright Blue #0165FC ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.050
- Electric Blue #0652FF ΔE 0.054
- Dark Periwinkle #665FD1 ΔE 0.071
Use #315AE1 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.