#317FEF
Closest named color: Clear Blue (#247AFD). oklch(60.9% 0.185 258.2), rgb(49, 127, 239).
Aa
Black text reads best on this color (5.41:1).
About this color
#317FEF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.185 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.027 away. Black text reads best on it, at 5.41:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.41:1 |
| White text | 3.87:1 |
Values
| HEX | #317FEF |
| RGB | rgb(49, 127, 239) |
| HSL | hsl(215, 86%, 56%) |
| OKLCH | oklch(60.9% 0.185 258.2) |
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 #317FEF | 3.87:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #317FEF | 5.41:1 | AA | Lc 38.3 | Non-text elements, placeholder text |
| #317FEF text on white | 3.87:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #317FEF text on black | 5.41:1 | AA | Lc -35.9 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFB
oklch(88.5% 0.05 257.7)
-
Step 300
300
#9DC3FB
oklch(81% 0.09 258)
-
Step 400
400
#65A1FA
oklch(70.7% 0.145 258.1)
-
Step 500
500 (this color)
#317FEF
oklch(60.9% 0.185 258.2)
-
Step 600
600
#0C6CE6
oklch(55.6% 0.202 258.3)
-
Step 700
700
#005AC6
oklch(49.1% 0.184 258.2)
-
Step 800
800
#054AA1
oklch(42.7% 0.154 258.1)
-
Step 900
900
#113F80
oklch(37.7% 0.12 258.2)
-
Step 950
950
#0C254B
oklch(26.9% 0.077 258.8)
#317FEF 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) | #408AF3 | 0.033 |
| Deuteranopia (no green cones) | #0079ED | 0.026 |
| Tritanopia (no blue cones) | #009AAB | 0.143 |
| Achromatopsia (no color) | #818181 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #317FEF
#317FEF
oklch(60.9% 0.185 258.2)
- #AC7800
#AC7800
oklch(61% 0.127 78.4)
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 #317FEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.027
- Dodger Blue #1E90FF ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.050
- Soft Blue #6488EA ΔE 0.056
- Royal Blue #4169E1 ΔE 0.056
- Cornflower #6A79F7 ΔE 0.057
- Water Blue #0E87CC ΔE 0.063
Use #317FEF 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.