#434CBB
Closest named color: Blue With A Hint Of Purple (#533CC6). oklch(47.6% 0.172 274.3), rgb(67, 76, 187).
Aa
White text reads best on this color (7.02:1).
About this color
#434CBB is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.172 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Blue With A Hint Of Purple (#533CC6), ΔE 0.042 away. White text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Blue With A Hint Of Purple (#533CC6) |
| Black text | 2.99:1 |
| White text | 7.02:1 |
Values
| HEX | #434CBB |
| RGB | rgb(67, 76, 187) |
| HSL | hsl(236, 47%, 50%) |
| OKLCH | oklch(47.6% 0.172 274.3) |
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 #434CBB | 7.02:1 | AAA | Lc -88.9 | Fine for body text |
| Black text on #434CBB | 2.99:1 | Fails | Lc 20.1 | Dividers and decoration only |
| #434CBB text on white | 7.02:1 | AAA | Lc 83.9 | Fine for body text |
| #434CBB text on black | 2.99:1 | Fails | Lc -18.1 | 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 700.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9FB
oklch(93.6% 0.025 275.9)
-
Step 200
200
#CFD8F9
oklch(88.6% 0.047 273.4)
-
Step 300
300
#B0BDF7
oklch(80.9% 0.083 274.6)
-
Step 400
400
#8899F3
oklch(70.7% 0.133 274.4)
-
Step 500
500
#6C7DEF
oklch(63.2% 0.17 274.1)
-
Step 600
600
#5663DD
oklch(55.7% 0.184 274.2)
-
Step 700
700 (this color)
#434CBB
oklch(47.6% 0.172 274.3)
-
Step 800
800
#3A439B
oklch(42.7% 0.142 274.3)
-
Step 900
900
#31397B
oklch(37.6% 0.111 274.5)
-
Step 950
950
#1C2248
oklch(26.9% 0.07 274)
#434CBB 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) | #005EBF | 0.057 |
| Deuteranopia (no green cones) | #0054B9 | 0.049 |
| Tritanopia (no blue cones) | #00677C | 0.143 |
| Achromatopsia (no color) | #595959 | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434CBB
#434CBB
oklch(47.6% 0.172 274.3)
- #6E5B00
#6E5B00
oklch(47.6% 0.098 94.8)
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 #434CBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue With A Hint Of Purple #533CC6 ΔE 0.042
- Majorelle Blue #3F37C9 ΔE 0.050
- Blue Blue #2242C7 ΔE 0.050
- Blurple #5539CC ΔE 0.051
- Bluey Purple #6241C7 ΔE 0.054
- Warm Blue #4B57DB ΔE 0.058
- Iris #6258C4 ΔE 0.059
- Blueberry #464196 ΔE 0.064
Use #434CBB 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.