#43719B
Closest named color: Muted Blue (#3B719F). oklch(53.4% 0.084 247.5), rgb(67, 113, 155).
Aa
White text reads best on this color (5.15:1).
About this color
#43719B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.084 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.010 away. White text reads best on it, at 5.15:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 4.07:1 |
| White text | 5.15:1 |
Values
| HEX | #43719B |
| RGB | rgb(67, 113, 155) |
| HSL | hsl(209, 40%, 44%) |
| OKLCH | oklch(53.4% 0.084 247.5) |
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 #43719B | 5.15:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #43719B | 4.07:1 | AA large text | Lc 28.7 | Dividers and decoration only |
| #43719B text on white | 5.15:1 | AA | Lc 75.4 | Fine for body text |
| #43719B text on black | 4.07:1 | AA large text | Lc -26.3 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300
#AEC3D8
oklch(80.8% 0.038 248.3)
-
Step 400
400
#83A5C5
oklch(70.8% 0.06 247.1)
-
Step 500
500
#638EB6
oklch(63.1% 0.077 247.3)
-
Step 600
600 (this color)
#43719B
oklch(53.4% 0.084 247.5)
-
Step 700
700
#3A648B
oklch(49% 0.079 248)
-
Step 800
800
#315271
oklch(42.7% 0.065 248.1)
-
Step 900
900
#2B445B
oklch(37.7% 0.05 247.3)
-
Step 950
950
#1A2835
oklch(27% 0.031 247.2)
#43719B 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) | #5F729D | 0.034 |
| Deuteranopia (no green cones) | #54699A | 0.028 |
| Tritanopia (no blue cones) | #007B80 | 0.071 |
| Achromatopsia (no color) | #6D6D6D | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43719B
#43719B
oklch(53.4% 0.084 247.5)
- #8D6334
#8D6334
oklch(53.4% 0.083 67.4)
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 #43719B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.010
- Dull Blue #49759C ΔE 0.014
- Flat Blue #3C73A8 ΔE 0.020
- Metallic Blue #4F738E ΔE 0.026
- Cerulean #457B9D ΔE 0.030
- Stormy Blue #507B9C ΔE 0.034
- Ocean Blue #03719C ΔE 0.037
- French Blue #436BAD ΔE 0.037
Use #43719B 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.