#315BD5
Closest named color: Warm Blue (#4B57DB). oklch(51.6% 0.194 265.5), rgb(49, 91, 213).
Aa
White text reads best on this color (5.85:1).
About this color
#315BD5 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.194 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.030 away. White text reads best on it, at 5.85:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.58:1 |
| White text | 5.85:1 |
Values
| HEX | #315BD5 |
| RGB | rgb(49, 91, 213) |
| HSL | hsl(225, 66%, 51%) |
| OKLCH | oklch(51.6% 0.194 265.5) |
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 #315BD5 | 5.85:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #315BD5 | 3.58:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #315BD5 text on white | 5.85:1 | AA | Lc 78.7 | Fine for body text |
| #315BD5 text on black | 3.58:1 | AA large text | Lc -23.1 | 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
#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
#A4C0FE
oklch(81% 0.093 265.6)
-
Step 400
400
#739CFE
oklch(70.6% 0.151 265.6)
-
Step 500
500
#5180FC
oklch(63.2% 0.192 265.6)
-
Step 600
600
#3765EB
oklch(55.6% 0.209 265.5)
-
Step 700
700 (this color)
#315BD5
oklch(51.6% 0.194 265.5)
-
Step 800
800
#2445A5
oklch(42.8% 0.16 265.5)
-
Step 900
900
#213B83
oklch(37.7% 0.125 265.7)
-
Step 950
950
#13234D
oklch(26.9% 0.08 265.6)
#315BD5 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) | #006DD9 | 0.045 |
| Deuteranopia (no green cones) | #005DD3 | 0.024 |
| Tritanopia (no blue cones) | #007A8F | 0.153 |
| Achromatopsia (no color) | #656565 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315BD5
#315BD5
oklch(51.6% 0.194 265.5)
- #836200
#836200
oklch(51.6% 0.106 85.5)
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 #315BD5, closest first.
No curated palette has a color within ΔE 0.04 of #315BD5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.030
- Azul #1D5DEC ΔE 0.037
- Royal Blue #4169E1 ΔE 0.044
- Neon Blue #4361EE ΔE 0.046
- Cerulean Blue #056EEE ΔE 0.058
- Bright Blue #0165FC ΔE 0.064
- Iris #6258C4 ΔE 0.064
- Blue Blue #2242C7 ΔE 0.066
Use #315BD5 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.