#4173EE
Closest named color: Clear Blue (#247AFD). oklch(58.9% 0.193 264.5), rgb(65, 115, 238).
Aa
Black text reads best on this color (4.91:1).
About this color
#4173EE is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.193 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.030 away. Black text reads best on it, at 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.193) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #4173EE |
| RGB | rgb(65, 115, 238) |
| HSL | hsl(223, 84%, 59%) |
| OKLCH | oklch(58.9% 0.193 264.5) |
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 #4173EE | 4.27:1 | AA large text | Lc -74.6 | Content text, not long reading |
| Black text on #4173EE | 4.91:1 | AA | Lc 35.0 | Non-text elements, placeholder text |
| #4173EE text on white | 4.27:1 | AA large text | Lc 69.1 | Content text, not long reading |
| #4173EE text on black | 4.91:1 | AA | Lc -32.6 | 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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9D9FA
oklch(88.4% 0.049 264.9)
-
Step 300
300
#A5C0FA
oklch(80.9% 0.088 265.1)
-
Step 400
400
#759EF7
oklch(70.8% 0.138 264.4)
-
Step 500
500
#5282F4
oklch(63.1% 0.179 264.6)
-
Step 600
600 (this color)
#4173EE
oklch(58.9% 0.193 264.5)
-
Step 700
700
#2B56C5
oklch(49.1% 0.18 264.5)
-
Step 800
800
#24479F
oklch(42.7% 0.149 264.5)
-
Step 900
900
#213D7E
oklch(37.7% 0.115 264.1)
-
Step 950
950
#14244A
oklch(27% 0.074 264.7)
#4173EE 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) | #1F83F2 | 0.041 |
| Deuteranopia (no green cones) | #0073EC | 0.032 |
| Tritanopia (no blue cones) | #0091A5 | 0.155 |
| Achromatopsia (no color) | #7A7A7A | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4173EE
#4173EE
oklch(58.9% 0.193 264.5)
- #9E7600
#9E7600
oklch(58.9% 0.121 84.8)
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 #4173EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.030
- Royal Blue #4169E1 ΔE 0.030
- Cerulean Blue #056EEE ΔE 0.036
- Neon Blue #4361EE ΔE 0.042
- Cornflower #6A79F7 ΔE 0.052
- Bright Blue #0165FC ΔE 0.056
- Azul #1D5DEC ΔE 0.064
- Warm Blue #4B57DB ΔE 0.070
Use #4173EE 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.