#405CDB
Closest named color: Warm Blue (#4B57DB). oklch(53% 0.196 269.1), rgb(64, 92, 219).
Aa
White text reads best on this color (5.56:1).
About this color
#405CDB is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.196 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.015 away. White text reads best on it, at 5.56:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.196) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.77:1 |
| White text | 5.56:1 |
Values
| HEX | #405CDB |
| RGB | rgb(64, 92, 219) |
| HSL | hsl(229, 68%, 55%) |
| OKLCH | oklch(53% 0.196 269.1) |
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 #405CDB | 5.56:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #405CDB | 3.77:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #405CDB text on white | 5.56:1 | AA | Lc 77.3 | Fine for body text |
| #405CDB text on black | 3.77:1 | AA large text | Lc -24.5 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD9FB
oklch(88.6% 0.049 268.8)
-
Step 300
300
#A9BFFB
oklch(81% 0.089 268.8)
-
Step 400
400
#7D9BF8
oklch(70.7% 0.141 269.1)
-
Step 500
500
#5E7FF5
oklch(63.2% 0.18 269)
-
Step 600
600 (this color)
#405CDB
oklch(53% 0.196 269.1)
-
Step 700
700
#3952C6
oklch(49% 0.182 269.2)
-
Step 800
800
#2F44A0
oklch(42.7% 0.151 269.3)
-
Step 900
900
#293B7F
oklch(37.8% 0.117 269)
-
Step 950
950
#18234A
oklch(27% 0.074 269.2)
#405CDB 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) | #006FDF | 0.051 |
| Deuteranopia (no green cones) | #0061D9 | 0.037 |
| Tritanopia (no blue cones) | #007C92 | 0.159 |
| Achromatopsia (no color) | #686868 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405CDB
#405CDB
oklch(53% 0.196 269.1)
- #856800
#856800
oklch(53.1% 0.109 89.4)
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 #405CDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.015
- Neon Blue #4361EE ΔE 0.032
- Royal Blue #4169E1 ΔE 0.032
- Azul #1D5DEC ΔE 0.037
- Dark Periwinkle #665FD1 ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.054
- Iris #6258C4 ΔE 0.056
- Slate Blue #6A5ACD ΔE 0.060
Use #405CDB 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.