#434EC9
Closest named color: Warm Blue (#4B57DB). oklch(49.1% 0.189 273.3), rgb(67, 78, 201).
Aa
White text reads best on this color (6.62:1).
About this color
#434EC9 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.189 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.037 away. White text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.17:1 |
| White text | 6.62:1 |
Values
| HEX | #434EC9 |
| RGB | rgb(67, 78, 201) |
| HSL | hsl(235, 55%, 53%) |
| OKLCH | oklch(49.1% 0.189 273.3) |
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 #434EC9 | 6.62:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #434EC9 | 3.17:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #434EC9 text on white | 6.62:1 | AA | Lc 82.2 | Fine for body text |
| #434EC9 text on black | 3.17:1 | AA large text | Lc -19.7 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FC
oklch(88.6% 0.051 273.1)
-
Step 300
300
#ADBDFC
oklch(80.9% 0.091 273.2)
-
Step 400
400
#8498FB
oklch(70.7% 0.146 273.5)
-
Step 500
500
#687BF8
oklch(63.2% 0.186 273.4)
-
Step 600
600
#5260E7
oklch(55.6% 0.202 273.4)
-
Step 700
700 (this color)
#434EC9
oklch(49.1% 0.189 273.3)
-
Step 800
800
#3741A2
oklch(42.7% 0.155 273.4)
-
Step 900
900
#2F3881
oklch(37.7% 0.122 273.7)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#434EC9 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) | #0063CD | 0.059 |
| Deuteranopia (no green cones) | #0057C7 | 0.047 |
| Tritanopia (no blue cones) | #006D84 | 0.154 |
| Achromatopsia (no color) | #5D5D5D | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434EC9
#434EC9
oklch(49.1% 0.189 273.3)
- #745F00
#745F00
oklch(49.2% 0.101 93.8)
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 #434EC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.037
- Blue With A Hint Of Purple #533CC6 ΔE 0.041
- Blurple #5539CC ΔE 0.046
- Majorelle Blue #3F37C9 ΔE 0.048
- Blue Blue #2242C7 ΔE 0.049
- Bluey Purple #6241C7 ΔE 0.051
- Iris #6258C4 ΔE 0.054
- Azul #1D5DEC ΔE 0.067
Use #434EC9 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.