#43739A
Closest named color: Dull Blue (#49759C). oklch(53.8% 0.081 244.6), rgb(67, 115, 154).
Aa
White text reads best on this color (5.05:1).
About this color
#43739A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.081 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.010 away. White text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.15:1 |
| White text | 5.05:1 |
Values
| HEX | #43739A |
| RGB | rgb(67, 115, 154) |
| HSL | hsl(207, 39%, 43%) |
| OKLCH | oklch(53.8% 0.081 244.6) |
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 #43739A | 5.05:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #43739A | 4.15:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #43739A text on white | 5.05:1 | AA | Lc 74.8 | Content text, not long reading |
| #43739A text on black | 4.15:1 | AA large text | Lc -27.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
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
#AEC4D7
oklch(81% 0.036 244.3)
-
Step 400
400
#82A5C3
oklch(70.7% 0.059 244.6)
-
Step 500
500
#628FB4
oklch(63.2% 0.075 244.2)
-
Step 600
600 (this color)
#43739A
oklch(53.8% 0.081 244.6)
-
Step 700
700
#396589
oklch(49.1% 0.076 244.9)
-
Step 800
800
#30536F
oklch(42.8% 0.062 244.1)
-
Step 900
900
#2B445A
oklch(37.6% 0.049 246.1)
-
Step 950
950
#192835
oklch(27% 0.032 245.5)
#43739A 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) | #62749C | 0.038 |
| Deuteranopia (no green cones) | #576B99 | 0.030 |
| Tritanopia (no blue cones) | #007C80 | 0.068 |
| Achromatopsia (no color) | #6F6F6F | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43739A
#43739A
oklch(53.8% 0.081 244.6)
- #8F6439
#8F6439
oklch(53.9% 0.081 64.6)
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 #43739A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.010
- Muted Blue #3B719F ΔE 0.014
- Metallic Blue #4F738E ΔE 0.022
- Flat Blue #3C73A8 ΔE 0.023
- Cerulean #457B9D ΔE 0.024
- Stormy Blue #507B9C ΔE 0.029
- Sea Blue #047495 ΔE 0.038
- Ocean Blue #03719C ΔE 0.038
Use #43739A 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.