#436EF1
Closest named color: Royal Blue (#4169E1). oklch(58.2% 0.203 266.4), rgb(67, 110, 241).
Aa
Black text reads best on this color (4.73:1).
About this color
#436EF1 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.203 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.027 away. Black text reads best on it, at 4.73:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #436EF1 |
| RGB | rgb(67, 110, 241) |
| HSL | hsl(225, 86%, 60%) |
| OKLCH | oklch(58.2% 0.203 266.4) |
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 #436EF1 | 4.43:1 | AA large text | Lc -75.7 | Fine for body text |
| Black text on #436EF1 | 4.73:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #436EF1 text on white | 4.43:1 | AA large text | Lc 70.2 | Content text, not long reading |
| #436EF1 text on black | 4.73:1 | AA | Lc -31.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FC
oklch(88.5% 0.051 267)
-
Step 300
300
#A5C0FC
oklch(80.9% 0.09 265.7)
-
Step 400
400
#769CFB
oklch(70.7% 0.146 266.3)
-
Step 500
500
#5580F9
oklch(63.2% 0.187 266.4)
-
Step 600
600 (this color)
#436EF1
oklch(58.2% 0.203 266.4)
-
Step 700
700
#2F53CA
oklch(49.1% 0.189 266.4)
-
Step 800
800
#2745A3
oklch(42.7% 0.156 266.3)
-
Step 900
900
#233B81
oklch(37.6% 0.122 266.3)
-
Step 950
950
#15234C
oklch(27% 0.078 266.9)
#436EF1 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) | #0080F6 | 0.048 |
| Deuteranopia (no green cones) | #0070EE | 0.034 |
| Tritanopia (no blue cones) | #008EA5 | 0.161 |
| Achromatopsia (no color) | #787878 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436EF1
#436EF1
oklch(58.2% 0.203 266.4)
- #9A7500
#9A7500
oklch(58.3% 0.119 86.4)
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 #436EF1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.027
- Neon Blue #4361EE ΔE 0.031
- Cerulean Blue #056EEE ΔE 0.034
- Clear Blue #247AFD ΔE 0.035
- Bright Blue #0165FC ΔE 0.048
- Azul #1D5DEC ΔE 0.055
- Cornflower #6A79F7 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.061
Use #436EF1 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.