#317FC2
Closest named color: Windows Blue (#3778BF). oklch(58.1% 0.128 248.1), rgb(49, 127, 194).
Aa
Black text reads best on this color (4.94:1).
About this color
#317FC2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.128 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.019 away. Black text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.94:1 |
| White text | 4.24:1 |
Values
| HEX | #317FC2 |
| RGB | rgb(49, 127, 194) |
| HSL | hsl(208, 60%, 48%) |
| OKLCH | oklch(58.1% 0.128 248.1) |
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 #317FC2 | 4.24:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #317FC2 | 4.94:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #317FC2 text on white | 4.24:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #317FC2 text on black | 4.94:1 | AA | Lc -32.7 | 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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A4C5E5
oklch(81% 0.058 247.7)
-
Step 400
400
#72A6D8
oklch(70.8% 0.092 248.3)
-
Step 500
500
#4A8ECD
oklch(63% 0.118 248.6)
-
Step 600
600 (this color)
#317FC2
oklch(58.1% 0.128 248.1)
-
Step 700
700
#1A64A0
oklch(49.1% 0.119 248.2)
-
Step 800
800
#195282
oklch(42.7% 0.099 248.2)
-
Step 900
900
#1C4468
oklch(37.7% 0.077 248.4)
-
Step 950
950
#11283D
oklch(26.9% 0.049 248.1)
#317FC2 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) | #6082C5 | 0.046 |
| Deuteranopia (no green cones) | #4B75C1 | 0.032 |
| Tritanopia (no blue cones) | #008F97 | 0.094 |
| Achromatopsia (no color) | #7B7B7B | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #317FC2
#317FC2
oklch(58.1% 0.128 248.1)
- #AB6A00
#AB6A00
oklch(58.2% 0.127 68.3)
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 #317FC2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.019
- Water Blue #0E87CC ΔE 0.025
- Steel Blue #4682B4 ΔE 0.030
- Cool Blue #4984B8 ΔE 0.031
- Nice Blue #107AB0 ΔE 0.036
- Blue NCS #118AB2 ΔE 0.046
- Flat Blue #3C73A8 ΔE 0.046
- Off Blue #5684AE ΔE 0.049
Use #317FC2 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.