#3181FB
Closest named color: Clear Blue (#247AFD). oklch(62.1% 0.198 259.1), rgb(49, 129, 251).
Aa
Black text reads best on this color (5.66:1).
About this color
#3181FB is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.198 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.021 away. Black text reads best on it, at 5.66:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.198) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.66:1 |
| White text | 3.70:1 |
Values
| HEX | #3181FB |
| RGB | rgb(49, 129, 251) |
| HSL | hsl(216, 96%, 59%) |
| OKLCH | oklch(62.1% 0.198 259.1) |
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 #3181FB | 3.70:1 | AA large text | Lc -69.6 | Content text, not long reading |
| Black text on #3181FB | 5.66:1 | AA | Lc 40.0 | Non-text elements, placeholder text |
| #3181FB text on white | 3.70:1 | AA large text | Lc 64.1 | Content text, not long reading |
| #3181FB text on black | 5.66:1 | AA | Lc -37.6 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFD
oklch(88.5% 0.053 258)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#63A0FF
oklch(70.7% 0.154 259)
-
Step 500
500 (this color)
#3181FB
oklch(62.1% 0.198 259.1)
-
Step 600
600
#026AEE
oklch(55.7% 0.215 259)
-
Step 700
700
#0058CA
oklch(49.1% 0.191 259.1)
-
Step 800
800
#0048A7
oklch(42.7% 0.165 259)
-
Step 900
900
#0E3E84
oklch(37.8% 0.128 258.8)
-
Step 950
950
#0A254D
oklch(27% 0.081 258.5)
#3181FB 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) | #378EFF | 0.034 |
| Deuteranopia (no green cones) | #007CF9 | 0.024 |
| Tritanopia (no blue cones) | #009FB2 | 0.153 |
| Achromatopsia (no color) | #858585 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3181FB
#3181FB
oklch(62.1% 0.198 259.1)
- #B07C00
#B07C00
oklch(62.3% 0.129 79.2)
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 #3181FB, closest first.
No curated palette has a color within ΔE 0.04 of #3181FB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.021
- Dodger Blue #1E90FF ΔE 0.037
- Cornflower #6A79F7 ΔE 0.054
- Dark Sky Blue #448EE4 ΔE 0.055
- Soft Blue #6488EA ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.063
- Royal Blue #4169E1 ΔE 0.067
Use #3181FB 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.