#317DDC
Closest named color: Water Blue (#0E87CC). oklch(59.2% 0.163 255.9), rgb(49, 125, 220).
Aa
Black text reads best on this color (5.09:1).
About this color
#317DDC is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.163 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.042 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.09:1 |
| White text | 4.11:1 |
Values
| HEX | #317DDC |
| RGB | rgb(49, 125, 220) |
| HSL | hsl(213, 71%, 53%) |
| OKLCH | oklch(59.2% 0.163 255.9) |
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 #317DDC | 4.11:1 | AA large text | Lc -73.4 | Content text, not long reading |
| Black text on #317DDC | 5.09:1 | AA | Lc 36.2 | Non-text elements, placeholder text |
| #317DDC text on white | 4.11:1 | AA large text | Lc 67.9 | Content text, not long reading |
| #317DDC text on black | 5.09:1 | AA | Lc -33.8 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400
#6EA3E9
oklch(70.7% 0.118 255.8)
-
Step 500
500
#468AE2
oklch(63.1% 0.15 255.9)
-
Step 600
600 (this color)
#317DDC
oklch(59.2% 0.163 255.9)
-
Step 700
700
#165FB4
oklch(49.1% 0.151 255.8)
-
Step 800
800
#164E92
oklch(42.8% 0.126 255.9)
-
Step 900
900
#1A4174
oklch(37.6% 0.098 256.3)
-
Step 950
950
#102744
oklch(27.1% 0.062 255.3)
#317DDC 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) | #4D85E0 | 0.034 |
| Deuteranopia (no green cones) | #2B76DA | 0.020 |
| Tritanopia (no blue cones) | #0094A2 | 0.125 |
| Achromatopsia (no color) | #7D7D7D | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #317DDC
#317DDC
oklch(59.2% 0.163 255.9)
- #A87200
#A87200
oklch(59.3% 0.125 76)
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 #317DDC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.042
- Windows Blue #3778BF ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.051
- Clear Blue #247AFD ΔE 0.052
- Royal Blue #4169E1 ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.055
- Soft Blue #6488EA ΔE 0.063
- Cool Blue #4984B8 ΔE 0.065
Use #317DDC 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.