#436AA3
Closest named color: French Blue (#436BAD). oklch(52.2% 0.101 257.8), rgb(67, 106, 163).
Aa
White text reads best on this color (5.48:1).
About this color
#436AA3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.101 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.016 away. White text reads best on it, at 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.82:1 |
| White text | 5.48:1 |
Values
| HEX | #436AA3 |
| RGB | rgb(67, 106, 163) |
| HSL | hsl(216, 42%, 45%) |
| OKLCH | oklch(52.2% 0.101 257.8) |
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 #436AA3 | 5.48:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #436AA3 | 3.82:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #436AA3 text on white | 5.48:1 | AA | Lc 77.2 | Fine for body text |
| #436AA3 text on black | 3.82:1 | AA large text | Lc -24.5 | 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 700.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ADC2E1
oklch(80.8% 0.05 258)
-
Step 400
400
#82A2D1
oklch(70.6% 0.078 257.9)
-
Step 500
500
#638BC6
oklch(63.2% 0.1 258)
-
Step 600
600
#4974B2
oklch(55.6% 0.108 257.6)
-
Step 700
700 (this color)
#436AA3
oklch(52.2% 0.101 257.8)
-
Step 800
800
#314F7C
oklch(42.6% 0.083 258.3)
-
Step 900
900
#2B4264
oklch(37.7% 0.065 258)
-
Step 950
950
#19273A
oklch(27% 0.041 256.3)
#436AA3 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) | #526EA5 | 0.022 |
| Deuteranopia (no green cones) | #4665A2 | 0.014 |
| Tritanopia (no blue cones) | #00777F | 0.088 |
| Achromatopsia (no color) | #696969 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #436AA3
#436AA3
oklch(52.2% 0.101 257.8)
- #896115
#896115
oklch(52.2% 0.101 77.9)
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 #436AA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.016
- Muted Blue #3B719F ΔE 0.023
- Flat Blue #3C73A8 ΔE 0.025
- Mid Blue #276AB3 ΔE 0.034
- Dusky Blue #475F94 ΔE 0.035
- Dull Blue #49759C ΔE 0.038
- Denim #3B638C ΔE 0.041
- Ocean Blue #03719C ΔE 0.044
Use #436AA3 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.