#4151CC
Closest named color: Warm Blue (#4B57DB). oklch(49.8% 0.189 271.9), rgb(65, 81, 204).
Aa
White text reads best on this color (6.41:1).
About this color
#4151CC is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.189 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.031 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #4151CC |
| RGB | rgb(65, 81, 204) |
| HSL | hsl(233, 58%, 53%) |
| OKLCH | oklch(49.8% 0.189 271.9) |
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 #4151CC | 6.41:1 | AA | Lc -86.5 | Fine for body text |
| Black text on #4151CC | 3.27:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #4151CC text on white | 6.41:1 | AA | Lc 81.3 | Fine for body text |
| #4151CC text on black | 3.27:1 | AA large text | Lc -20.5 | 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
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ABBEFD
oklch(81% 0.092 271.3)
-
Step 400
400
#8199FB
oklch(70.7% 0.146 271.8)
-
Step 500
500
#647CF9
oklch(63.2% 0.187 271.8)
-
Step 600
600
#4E61E8
oklch(55.7% 0.203 271.9)
-
Step 700
700 (this color)
#4151CC
oklch(49.8% 0.189 271.9)
-
Step 800
800
#3442A3
oklch(42.8% 0.156 271.8)
-
Step 900
900
#2C3981
oklch(37.7% 0.122 271.6)
-
Step 950
950
#1A224C
oklch(27.1% 0.078 272.1)
#4151CC 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) | #0065D0 | 0.056 |
| Deuteranopia (no green cones) | #0059CA | 0.043 |
| Tritanopia (no blue cones) | #007087 | 0.154 |
| Achromatopsia (no color) | #5F5F5F | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4151CC
#4151CC
oklch(49.8% 0.189 271.9)
- #786000
#786000
oklch(49.9% 0.102 91.7)
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 #4151CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.031
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Blurple #5539CC ΔE 0.052
- Blue Blue #2242C7 ΔE 0.053
- Iris #6258C4 ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.056
- Azul #1D5DEC ΔE 0.060
Use #4151CC 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.