#436FCE
Closest named color: Royal Blue (#4169E1). oklch(56% 0.155 263.5), rgb(67, 111, 206).
Aa
White text reads best on this color (4.76:1).
About this color
#436FCE is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.155 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.035 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #436FCE |
| RGB | rgb(67, 111, 206) |
| HSL | hsl(221, 59%, 54%) |
| OKLCH | oklch(56% 0.155 263.5) |
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 #436FCE | 4.76:1 | AA | Lc -78.2 | Fine for body text |
| Black text on #436FCE | 4.40:1 | AA large text | Lc 31.3 | Non-text elements, placeholder text |
| #436FCE text on white | 4.76:1 | AA | Lc 72.8 | Content text, not long reading |
| #436FCE text on black | 4.40:1 | AA large text | Lc -28.9 | Dividers and decoration only |
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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#AAC1EF
oklch(81% 0.07 264.1)
-
Step 400
400
#7CA0E6
oklch(70.8% 0.111 263)
-
Step 500
500
#5B86DF
oklch(63% 0.143 263.4)
-
Step 600
600 (this color)
#436FCE
oklch(56% 0.155 263.5)
-
Step 700
700
#345BB1
oklch(49% 0.144 263.6)
-
Step 800
800
#2B4B8F
oklch(42.6% 0.119 263.3)
-
Step 900
900
#273F72
oklch(37.6% 0.092 263.6)
-
Step 950
950
#172543
oklch(26.9% 0.059 264)
#436FCE 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) | #3F79D2 | 0.026 |
| Deuteranopia (no green cones) | #236DCC | 0.027 |
| Tritanopia (no blue cones) | #008594 | 0.127 |
| Achromatopsia (no color) | #737373 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436FCE
#436FCE
oklch(56% 0.155 263.5)
- #946D00
#946D00
oklch(55.9% 0.115 83.7)
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 #436FCE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.035
- Windows Blue #3778BF ΔE 0.037
- French Blue #436BAD ΔE 0.051
- Mid Blue #276AB3 ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.058
- Neon Blue #4361EE ΔE 0.062
- Warm Blue #4B57DB ΔE 0.063
Use #436FCE 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.