#434DCB
Closest named color: Warm Blue (#4B57DB). oklch(49.1% 0.192 273.4), rgb(67, 77, 203).
Aa
White text reads best on this color (6.64:1).
About this color
#434DCB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.192 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.036 away. White text reads best on it, at 6.64:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.16:1 |
| White text | 6.64:1 |
Values
| HEX | #434DCB |
| RGB | rgb(67, 77, 203) |
| HSL | hsl(236, 57%, 53%) |
| OKLCH | oklch(49.1% 0.192 273.4) |
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 #434DCB | 6.64:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #434DCB | 3.16:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #434DCB text on white | 6.64:1 | AA | Lc 82.3 | Fine for body text |
| #434DCB text on black | 3.16:1 | AA large text | Lc -19.6 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CED8FC
oklch(88.6% 0.051 273.1)
-
Step 300
300
#ADBDFD
oklch(80.9% 0.092 273.3)
-
Step 400
400
#8398FD
oklch(70.8% 0.149 273.2)
-
Step 500
500
#677AFA
oklch(63% 0.19 273.3)
-
Step 600
600
#525FE9
oklch(55.6% 0.206 273.5)
-
Step 700
700 (this color)
#434DCB
oklch(49.1% 0.192 273.4)
-
Step 800
800
#3740A4
oklch(42.7% 0.159 273.6)
-
Step 900
900
#2E3882
oklch(37.7% 0.124 273.1)
-
Step 950
950
#1B214C
oklch(26.9% 0.079 273.9)
#434DCB 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) | #0063CF | 0.060 |
| Deuteranopia (no green cones) | #0056C9 | 0.047 |
| Tritanopia (no blue cones) | #006D85 | 0.156 |
| Achromatopsia (no color) | #5C5C5C | 0.193 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #434DCB
#434DCB
oklch(49.1% 0.192 273.4)
- #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 #434DCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.036
- Blue With A Hint Of Purple #533CC6 ΔE 0.040
- Blurple #5539CC ΔE 0.044
- Majorelle Blue #3F37C9 ΔE 0.046
- Blue Blue #2242C7 ΔE 0.048
- Bluey Purple #6241C7 ΔE 0.050
- Iris #6258C4 ΔE 0.056
- Azul #1D5DEC ΔE 0.066
Use #434DCB 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.