#017EE5
Closest named color: Clear Blue (#247AFD). oklch(59.3% 0.181 252.7), rgb(1, 126, 229).
Aa
Black text reads best on this color (5.11:1).
About this color
#017EE5 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.181 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.040 away. Black text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.11:1 |
| White text | 4.10:1 |
Values
| HEX | #017EE5 |
| RGB | rgb(1, 126, 229) |
| HSL | hsl(207, 99%, 45%) |
| OKLCH | oklch(59.3% 0.181 252.7) |
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 #017EE5 | 4.10:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #017EE5 | 5.11:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #017EE5 text on white | 4.10:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #017EE5 text on black | 5.11:1 | AA | Lc -34.3 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DCF7
oklch(88.6% 0.045 252.5)
-
Step 300
300
#9BC4F4
oklch(80.8% 0.081 252.7)
-
Step 400
400
#62A4EF
oklch(70.7% 0.13 252.8)
-
Step 500
500
#2E8BEA
oklch(63.1% 0.166 252.7)
-
Step 600
600 (this color)
#017EE5
oklch(59.3% 0.181 252.7)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#004F93
oklch(42.7% 0.13 252.6)
-
Step 900
900
#084279
oklch(37.7% 0.109 252.7)
-
Step 950
950
#092747
oklch(27% 0.069 253.1)
#017EE5 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) | #4587E9 | 0.044 |
| Deuteranopia (no green cones) | #0375E3 | 0.024 |
| Tritanopia (no blue cones) | #0097A6 | 0.133 |
| Achromatopsia (no color) | #7D7D7D | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #017EE5
#017EE5
oklch(59.3% 0.181 252.7)
- #AB7000
#AB7000
oklch(59.3% 0.126 72.9)
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 #017EE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.040
- Cerulean Blue #056EEE ΔE 0.044
- Water Blue #0E87CC ΔE 0.049
- Royal Blue #4169E1 ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.058
- Windows Blue #3778BF ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.060
- Bright Blue #0165FC ΔE 0.073
Use #017EE5 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.