#43739C
Closest named color: Dull Blue (#49759C). oklch(53.9% 0.083 245.9), rgb(67, 115, 156).
Aa
White text reads best on this color (5.03:1).
About this color
#43739C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.083 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.009 away. White text reads best on it, at 5.03:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.17:1 |
| White text | 5.03:1 |
Values
| HEX | #43739C |
| RGB | rgb(67, 115, 156) |
| HSL | hsl(208, 40%, 44%) |
| OKLCH | oklch(53.9% 0.083 245.9) |
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 #43739C | 5.03:1 | AA | Lc -80.0 | Fine for body text |
| Black text on #43739C | 4.17:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #43739C text on white | 5.03:1 | AA | Lc 74.7 | Content text, not long reading |
| #43739C text on black | 4.17:1 | AA large text | Lc -27.1 | 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
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#AEC4D8
oklch(81% 0.037 245.7)
-
Step 400
400
#82A5C4
oklch(70.7% 0.06 245.5)
-
Step 500
500
#628EB5
oklch(63% 0.076 246.1)
-
Step 600
600 (this color)
#43739C
oklch(53.9% 0.083 245.9)
-
Step 700
700
#39658A
oklch(49.2% 0.077 245.6)
-
Step 800
800
#305270
oklch(42.6% 0.064 246.6)
-
Step 900
900
#2B445B
oklch(37.7% 0.05 247.3)
-
Step 950
950
#192835
oklch(27% 0.032 245.5)
#43739C 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) | #62749E | 0.038 |
| Deuteranopia (no green cones) | #566B9B | 0.029 |
| Tritanopia (no blue cones) | #007D81 | 0.070 |
| Achromatopsia (no color) | #6F6F6F | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43739C
#43739C
oklch(53.9% 0.083 245.9)
- #8F6437
#8F6437
oklch(53.9% 0.083 65.7)
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 #43739C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.009
- Muted Blue #3B719F ΔE 0.012
- Flat Blue #3C73A8 ΔE 0.020
- Cerulean #457B9D ΔE 0.024
- Metallic Blue #4F738E ΔE 0.025
- Stormy Blue #507B9C ΔE 0.029
- Ocean Blue #03719C ΔE 0.038
- Sea Blue #047495 ΔE 0.039
Use #43739C 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.