#3443B1
Closest named color: Sapphire (#2138AB). oklch(44.2% 0.174 271.3), rgb(52, 67, 177).
Aa
White text reads best on this color (8.12:1).
About this color
#3443B1 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.174 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.038 away. White text reads best on it, at 8.12:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.58:1 |
| White text | 8.12:1 |
Values
| HEX | #3443B1 |
| RGB | rgb(52, 67, 177) |
| HSL | hsl(233, 55%, 45%) |
| OKLCH | oklch(44.2% 0.174 271.3) |
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 #3443B1 | 8.12:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #3443B1 | 2.58:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #3443B1 text on white | 8.12:1 | AAA | Lc 87.6 | Fine for body text |
| #3443B1 text on black | 2.58:1 | Fails | Lc -14.6 | Not readable |
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 800.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABEFF
oklch(81% 0.095 271)
-
Step 400
400
#7F99FF
oklch(70.8% 0.152 271.3)
-
Step 500
500
#617AFF
oklch(63% 0.198 271.6)
-
Step 600
600
#495CF4
oklch(55.5% 0.226 271.3)
-
Step 700
700
#3B4AD5
oklch(49% 0.211 271.2)
-
Step 800
800 (this color)
#3443B1
oklch(44.2% 0.174 271.3)
-
Step 900
900
#2A3788
oklch(37.7% 0.135 271.4)
-
Step 950
950
#182150
oklch(27% 0.087 271.3)
#3443B1 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) | #0055B5 | 0.049 |
| Deuteranopia (no green cones) | #004AAF | 0.036 |
| Tritanopia (no blue cones) | #005F73 | 0.141 |
| Achromatopsia (no color) | #4F4F4F | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3443B1
#3443B1
oklch(44.2% 0.174 271.3)
- #655000
#655000
oklch(44% 0.09 91.3)
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 #3443B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.038
- Blue Blue #2242C7 ΔE 0.039
- Majorelle Blue #3F37C9 ΔE 0.045
- Blueberry #464196 ΔE 0.050
- Blue With A Hint Of Purple #533CC6 ΔE 0.056
- Cobalt #1E488F ΔE 0.062
- Blurple #5539CC ΔE 0.065
- Dark Slate Blue #483D8B ΔE 0.068
Use #3443B1 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.