#405BE3
Closest named color: Warm Blue (#4B57DB). oklch(53.5% 0.208 269.4), rgb(64, 91, 227).
Aa
White text reads best on this color (5.49:1).
About this color
#405BE3 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.208 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.018 away. White text reads best on it, at 5.49:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.208) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #405BE3 |
| RGB | rgb(64, 91, 227) |
| HSL | hsl(230, 74%, 57%) |
| OKLCH | oklch(53.5% 0.208 269.4) |
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 #405BE3 | 5.49:1 | AA | Lc -82.2 | Fine for body text |
| Black text on #405BE3 | 3.82:1 | AA large text | Lc 27.2 | Dividers and decoration only |
| #405BE3 text on white | 5.49:1 | AA | Lc 76.8 | Fine for body text |
| #405BE3 text on black | 3.82:1 | AA large text | Lc -24.9 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CBD8FD
oklch(88.4% 0.053 270)
-
Step 300
300
#A8BEFE
oklch(80.8% 0.094 269.6)
-
Step 400
400
#7B9AFD
oklch(70.6% 0.149 269.2)
-
Step 500
500
#5C7DFB
oklch(63.1% 0.191 269.3)
-
Step 600
600 (this color)
#405BE3
oklch(53.5% 0.208 269.4)
-
Step 700
700
#3850CC
oklch(49.1% 0.193 269.4)
-
Step 800
800
#2E42A5
oklch(42.6% 0.161 269.6)
-
Step 900
900
#283A83
oklch(37.8% 0.125 269.2)
-
Step 950
950
#17224C
oklch(26.8% 0.079 269.4)
#405BE3 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) | #0071E7 | 0.056 |
| Deuteranopia (no green cones) | #0062E0 | 0.037 |
| Tritanopia (no blue cones) | #007D96 | 0.165 |
| Achromatopsia (no color) | #696969 | 0.208 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405BE3
#405BE3
oklch(53.5% 0.208 269.4)
- #866900
#866900
oklch(53.4% 0.109 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 #405BE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.018
- Neon Blue #4361EE ΔE 0.022
- Azul #1D5DEC ΔE 0.030
- Royal Blue #4169E1 ΔE 0.034
- Cerulean Blue #056EEE ΔE 0.051
- Bright Blue #0165FC ΔE 0.051
- Dark Periwinkle #665FD1 ΔE 0.059
- Electric Blue #0652FF ΔE 0.060
Use #405BE3 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.