#4D51BF
Closest named color: Iris (#6258C4). oklch(49.5% 0.169 276.7), rgb(77, 81, 191).
Aa
White text reads best on this color (6.47:1).
About this color
#4D51BF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.169 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.038 away. White text reads best on it, at 6.47:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.24:1 |
| White text | 6.47:1 |
Values
| HEX | #4D51BF |
| RGB | rgb(77, 81, 191) |
| HSL | hsl(238, 47%, 53%) |
| OKLCH | oklch(49.5% 0.169 276.7) |
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 #4D51BF | 6.47:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #4D51BF | 3.24:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #4D51BF text on white | 6.47:1 | AA | Lc 81.7 | Fine for body text |
| #4D51BF text on black | 3.24:1 | 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
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#D1D7F8
oklch(88.5% 0.046 277.3)
-
Step 300
300
#B2BCF6
oklch(80.8% 0.083 276.8)
-
Step 400
400
#8C98F1
oklch(70.7% 0.13 276.7)
-
Step 500
500
#727BEC
oklch(63% 0.167 277)
-
Step 600
600
#5C62DB
oklch(55.7% 0.182 276.6)
-
Step 700
700 (this color)
#4D51BF
oklch(49.5% 0.169 276.7)
-
Step 800
800
#3E4299
oklch(42.6% 0.14 276.7)
-
Step 900
900
#34397A
oklch(37.7% 0.109 276.5)
-
Step 950
950
#1E2247
oklch(27% 0.068 276.2)
#4D51BF 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) | #0063C3 | 0.064 |
| Deuteranopia (no green cones) | #0059BD | 0.059 |
| Tritanopia (no blue cones) | #006B80 | 0.145 |
| Achromatopsia (no color) | #5E5E5E | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D51BF
#4D51BF
oklch(49.5% 0.169 276.7)
- #736100
#736100
oklch(49.5% 0.102 96.4)
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 #4D51BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.038
- Warm Blue #4B57DB ΔE 0.045
- Blue With A Hint Of Purple #533CC6 ΔE 0.046
- Bluey Purple #6241C7 ΔE 0.046
- Blurple #5539CC ΔE 0.053
- Slate Blue #6A5ACD ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.059
- Light Indigo #6D5ACF ΔE 0.061
Use #4D51BF 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.