#4055BB
Closest named color: Iris (#6258C4). oklch(49.1% 0.162 270.6), rgb(64, 85, 187).
Aa
White text reads best on this color (6.49:1).
About this color
#4055BB is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.162 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.051 away. White text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #4055BB |
| RGB | rgb(64, 85, 187) |
| HSL | hsl(230, 49%, 49%) |
| OKLCH | oklch(49.1% 0.162 270.6) |
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 #4055BB | 6.49:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #4055BB | 3.23:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #4055BB text on white | 6.49:1 | AA | Lc 81.8 | Fine for body text |
| #4055BB text on black | 3.23:1 | AA large text | Lc -20.1 | 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
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#ADBFF4
oklch(81% 0.078 270)
-
Step 400
400
#839BEF
oklch(70.6% 0.126 270.8)
-
Step 500
500
#6680E9
oklch(63% 0.16 270.8)
-
Step 600
600
#4F67D8
oklch(55.6% 0.175 270.7)
-
Step 700
700 (this color)
#4055BB
oklch(49.1% 0.162 270.6)
-
Step 800
800
#354697
oklch(42.7% 0.134 270.8)
-
Step 900
900
#2D3C78
oklch(37.7% 0.104 270.2)
-
Step 950
950
#1A2346
oklch(26.8% 0.066 270.6)
#4055BB 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) | #0564BF | 0.048 |
| Deuteranopia (no green cones) | #0059B9 | 0.042 |
| Tritanopia (no blue cones) | #006D80 | 0.133 |
| Achromatopsia (no color) | #5E5E5E | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4055BB
#4055BB
oklch(49.1% 0.162 270.6)
- #765E00
#765E00
oklch(49.2% 0.101 91.4)
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 #4055BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.051
- Warm Blue #4B57DB ΔE 0.052
- Mid Blue #276AB3 ΔE 0.060
- Blue With A Hint Of Purple #533CC6 ΔE 0.060
- Blue Blue #2242C7 ΔE 0.062
- Bluey Purple #6241C7 ΔE 0.065
- French Blue #436BAD ΔE 0.067
- Blurple #5539CC ΔE 0.068
Use #4055BB 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.