#313BF0
Closest named color: Light Royal Blue (#3A2EFE). oklch(49% 0.261 269.6), rgb(49, 59, 240).
Aa
White text reads best on this color (6.96:1).
About this color
#313BF0 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.261 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Light Royal Blue (#3A2EFE), ΔE 0.025 away. White text reads best on it, at 6.96:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.261) |
| Temperature | cool |
| Nearest name | Light Royal Blue (#3A2EFE) |
| Black text | 3.01:1 |
| White text | 6.96:1 |
Values
| HEX | #313BF0 |
| RGB | rgb(49, 59, 240) |
| HSL | hsl(237, 86%, 57%) |
| OKLCH | oklch(49% 0.261 269.6) |
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 #313BF0 | 6.96:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #313BF0 | 3.01:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #313BF0 text on white | 6.96:1 | AA | Lc 82.8 | Fine for body text |
| #313BF0 text on black | 3.01:1 | AA large text | Lc -19.1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7B9AFF
oklch(70.8% 0.152 269.4)
-
Step 500
500
#5C7CFF
oklch(63.1% 0.197 269.6)
-
Step 600
600
#4059FF
oklch(55.5% 0.245 269.5)
-
Step 700
700 (this color)
#313BF0
oklch(49% 0.261 269.6)
-
Step 800
800
#2834C2
oklch(42.7% 0.216 269.6)
-
Step 900
900
#223199
oklch(37.7% 0.169 269.6)
-
Step 950
950
#131E59
oklch(26.9% 0.107 269.6)
#313BF0 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) | #0063F5 | 0.076 |
| Deuteranopia (no green cones) | #0050ED | 0.040 |
| Tritanopia (no blue cones) | #007294 | 0.200 |
| Achromatopsia (no color) | #595959 | 0.262 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #313BF0
#313BF0
oklch(49% 0.261 269.6)
- #775D00
#775D00
oklch(49.1% 0.1 89.6)
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 #313BF0, closest first.
No curated palette has a color within ΔE 0.04 of #313BF0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Royal Blue #3A2EFE ΔE 0.025
- Vibrant Blue #0339F8 ΔE 0.032
- Vivid Blue #152EFF ΔE 0.038
- Electric Blue #0652FF ΔE 0.049
- Rich Blue #021BF9 ΔE 0.057
- Azul #1D5DEC ΔE 0.063
- Majorelle Blue #3F37C9 ΔE 0.064
- Blue Blue #2242C7 ΔE 0.065
Use #313BF0 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.