#436FE7
Closest named color: Royal Blue (#4169E1). oklch(57.7% 0.188 265.6), rgb(67, 111, 231).
Aa
Black text reads best on this color (4.66:1).
About this color
#436FE7 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.188 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.017 away. Black text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.66:1 |
| White text | 4.50:1 |
Values
| HEX | #436FE7 |
| RGB | rgb(67, 111, 231) |
| HSL | hsl(224, 77%, 58%) |
| OKLCH | oklch(57.7% 0.188 265.6) |
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 #436FE7 | 4.50:1 | AA | Lc -76.3 | Fine for body text |
| Black text on #436FE7 | 4.66:1 | AA | Lc 33.3 | Non-text elements, placeholder text |
| #436FE7 text on white | 4.50:1 | AA | Lc 70.8 | Content text, not long reading |
| #436FE7 text on black | 4.66:1 | AA | Lc -30.9 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CAD9F9
oklch(88.4% 0.047 265.5)
-
Step 300
300
#A7C0F8
oklch(80.9% 0.084 265.9)
-
Step 400
400
#789DF5
oklch(70.6% 0.136 265.8)
-
Step 500
500
#5682F1
oklch(63.1% 0.173 265.5)
-
Step 600
600 (this color)
#436FE7
oklch(57.7% 0.188 265.6)
-
Step 700
700
#3056C2
oklch(49.1% 0.175 265.6)
-
Step 800
800
#28479D
oklch(42.7% 0.145 265.6)
-
Step 900
900
#243D7D
oklch(37.8% 0.113 265.3)
-
Step 950
950
#152449
oklch(27% 0.072 265.3)
#436FE7 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) | #1D7FEB | 0.042 |
| Deuteranopia (no green cones) | #0070E5 | 0.035 |
| Tritanopia (no blue cones) | #008CA0 | 0.152 |
| Achromatopsia (no color) | #777777 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436FE7
#436FE7
oklch(57.7% 0.188 265.6)
- #997300
#997300
oklch(57.7% 0.118 85.5)
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 #436FE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.017
- Cerulean Blue #056EEE ΔE 0.035
- Neon Blue #4361EE ΔE 0.035
- Clear Blue #247AFD ΔE 0.042
- Bright Blue #0165FC ΔE 0.056
- Azul #1D5DEC ΔE 0.057
- Warm Blue #4B57DB ΔE 0.058
- Cornflower #6A79F7 ΔE 0.059
Use #436FE7 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.