#0475EB
Closest named color: Cerulean Blue (#056EEE). oklch(57.8% 0.198 256.4), rgb(4, 117, 235).
Aa
Black text reads best on this color (4.74:1).
About this color
#0475EB is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.198 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.018 away. Black text reads best on it, at 4.74:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.198) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.74:1 |
| White text | 4.42:1 |
Values
| HEX | #0475EB |
| RGB | rgb(4, 117, 235) |
| HSL | hsl(211, 97%, 47%) |
| OKLCH | oklch(57.8% 0.198 256.4) |
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 #0475EB | 4.42:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #0475EB | 4.74:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #0475EB text on white | 4.42:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #0475EB text on black | 4.74:1 | AA | Lc -31.8 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#9BC3FA
oklch(80.8% 0.089 256.5)
-
Step 400
400
#62A2F8
oklch(70.7% 0.143 256.3)
-
Step 500
500
#3288F5
oklch(63.2% 0.182 256.3)
-
Step 600
600 (this color)
#0475EB
oklch(57.8% 0.198 256.4)
-
Step 700
700
#005DBE
oklch(49.2% 0.17 256.3)
-
Step 800
800
#004C9D
oklch(42.8% 0.147 256.2)
-
Step 900
900
#0B407F
oklch(37.8% 0.119 256.2)
-
Step 950
950
#0A264A
oklch(27% 0.075 256.3)
#0475EB 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) | #2482EF | 0.037 |
| Deuteranopia (no green cones) | #006FE9 | 0.016 |
| Tritanopia (no blue cones) | #0092A5 | 0.148 |
| Achromatopsia (no color) | #787878 | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0475EB
#0475EB
oklch(57.8% 0.198 256.4)
- #A26E00
#A26E00
oklch(57.8% 0.121 76.1)
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 #0475EB, closest first.
No curated palette has a color within ΔE 0.04 of #0475EB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.018
- Clear Blue #247AFD ΔE 0.033
- Royal Blue #4169E1 ΔE 0.039
- Bright Blue #0165FC ΔE 0.047
- Neon Blue #4361EE ΔE 0.053
- Azul #1D5DEC ΔE 0.057
- Windows Blue #3778BF ΔE 0.071
- Water Blue #0E87CC ΔE 0.073
Use #0475EB 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.