#43A4E9
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.2% 0.136 243.3), rgb(67, 164, 233).
Aa
Black text reads best on this color (7.72:1).
About this color
#43A4E9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.136 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.044 away. Black text reads best on it, at 7.72:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.72:1 |
| White text | 2.71:1 |
Values
| HEX | #43A4E9 |
| RGB | rgb(67, 164, 233) |
| HSL | hsl(205, 79%, 59%) |
| OKLCH | oklch(69.2% 0.136 243.3) |
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 #43A4E9 | 2.71:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #43A4E9 | 7.72:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #43A4E9 text on white | 2.71:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #43A4E9 text on black | 7.72:1 | AAA | Lc -49.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7FD
oklch(97.2% 0.012 239.9)
-
Step 100
100
#DDECF9
oklch(93.6% 0.024 244.1)
-
Step 200
200
#BFDDF6
oklch(88.4% 0.047 243.4)
-
Step 300
300
#91C7F4
oklch(80.8% 0.085 244.3)
-
Step 400
400 (this color)
#43A4E9
oklch(69.2% 0.136 243.3)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#43A4E9 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) | #84A6EC | 0.062 |
| Deuteranopia (no green cones) | #6D96E8 | 0.048 |
| Tritanopia (no blue cones) | #00B5BC | 0.097 |
| Achromatopsia (no color) | #9D9D9D | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43A4E9
#43A4E9
oklch(69.2% 0.136 243.3)
- #D68733
#D68733
oklch(69.2% 0.136 63.2)
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 #43A4E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.059
- Deep Sky Blue #00BFFF ΔE 0.072
- Dodger Blue #1E90FF ΔE 0.073
- Soft Blue #6488EA ΔE 0.076
- Turquoise Blue #06B1C4 ΔE 0.078
- Faded Blue #658CBB ΔE 0.083
Use #43A4E9 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.