#4057B5
Closest named color: Mid Blue (#276AB3). oklch(49.1% 0.151 269.7), rgb(64, 87, 181).
Aa
White text reads best on this color (6.46:1).
About this color
#4057B5 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.151 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.053 away. White text reads best on it, at 6.46:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.24:1 |
| White text | 6.46:1 |
Values
| HEX | #4057B5 |
| RGB | rgb(64, 87, 181) |
| HSL | hsl(228, 48%, 48%) |
| OKLCH | oklch(49.1% 0.151 269.7) |
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 #4057B5 | 6.46:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #4057B5 | 3.24:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #4057B5 text on white | 6.46:1 | AA | Lc 81.8 | Fine for body text |
| #4057B5 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#AEBFF1
oklch(80.9% 0.073 270.1)
-
Step 400
400
#849DEA
oklch(70.8% 0.117 269.6)
-
Step 500
500
#6682E3
oklch(63.1% 0.149 269.6)
-
Step 600
600
#4F69D1
oklch(55.5% 0.163 269.9)
-
Step 700
700 (this color)
#4057B5
oklch(49.1% 0.151 269.7)
-
Step 800
800
#354893
oklch(42.8% 0.125 269.8)
-
Step 900
900
#2D3D75
oklch(37.7% 0.098 269.3)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#4057B5 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) | #1F64B8 | 0.040 |
| Deuteranopia (no green cones) | #0059B3 | 0.042 |
| Tritanopia (no blue cones) | #006D7D | 0.127 |
| Achromatopsia (no color) | #5E5E5E | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4057B5
#4057B5
oklch(49.1% 0.151 269.7)
- #775D00
#775D00
oklch(49.1% 0.1 89.6)
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 #4057B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.053
- Iris #6258C4 ΔE 0.054
- French Blue #436BAD ΔE 0.059
- Denim Blue #3B5B92 ΔE 0.060
- Warm Blue #4B57DB ΔE 0.061
- Dusky Blue #475F94 ΔE 0.061
- Twilight #4E518B ΔE 0.068
- Blue With A Hint Of Purple #533CC6 ΔE 0.068
Use #4057B5 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.