#43799F
Closest named color: Cerulean (#457B9D). oklch(55.5% 0.083 241.1), rgb(67, 121, 159).
Aa
White text reads best on this color (4.69:1).
About this color
#43799F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.083 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.008 away. White text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #43799F |
| RGB | rgb(67, 121, 159) |
| HSL | hsl(205, 41%, 44%) |
| OKLCH | oklch(55.5% 0.083 241.1) |
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 #43799F | 4.69:1 | AA | Lc -77.9 | Fine for body text |
| Black text on #43799F | 4.47:1 | AA large text | Lc 31.6 | Non-text elements, placeholder text |
| #43799F text on white | 4.69:1 | AA | Lc 72.4 | Content text, not long reading |
| #43799F text on black | 4.47:1 | AA large text | Lc -29.2 | 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
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE6
oklch(88.5% 0.021 243.4)
-
Step 300
300
#ACC4D7
oklch(80.8% 0.038 241.9)
-
Step 400
400
#80A6C3
oklch(70.8% 0.059 241.5)
-
Step 500
500
#5E90B3
oklch(63.2% 0.075 240)
-
Step 600
600 (this color)
#43799F
oklch(55.5% 0.083 241.1)
-
Step 700
700
#356688
oklch(49.1% 0.076 241)
-
Step 800
800
#2C536F
oklch(42.6% 0.064 241.6)
-
Step 900
900
#28455A
oklch(37.7% 0.05 241.3)
-
Step 950
950
#182834
oklch(26.8% 0.031 241.7)
#43799F 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) | #6879A1 | 0.043 |
| Deuteranopia (no green cones) | #5C709E | 0.035 |
| Tritanopia (no blue cones) | #008286 | 0.065 |
| Achromatopsia (no color) | #747474 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #43799F
#43799F
oklch(55.5% 0.083 241.1)
- #96673E
#96673E
oklch(55.4% 0.083 60.9)
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 #43799F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.008
- Dull Blue #49759C ΔE 0.012
- Stormy Blue #507B9C ΔE 0.016
- Muted Blue #3B719F ΔE 0.026
- Flat Blue #3C73A8 ΔE 0.027
- Metallic Blue #4F738E ΔE 0.028
- Nice Blue #107AB0 ΔE 0.038
- Steel Blue #4682B4 ΔE 0.038
Use #43799F 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.