#405FCB
Closest named color: Warm Blue (#4B57DB). oklch(52.3% 0.171 267.9), rgb(64, 95, 203).
Aa
White text reads best on this color (5.64:1).
About this color
#405FCB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.171 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.033 away. White text reads best on it, at 5.64:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.71:1 |
| White text | 5.64:1 |
Values
| HEX | #405FCB |
| RGB | rgb(64, 95, 203) |
| HSL | hsl(227, 57%, 52%) |
| OKLCH | oklch(52.3% 0.171 267.9) |
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 #405FCB | 5.64:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #405FCB | 3.71:1 | AA large text | Lc 26.2 | Dividers and decoration only |
| #405FCB text on white | 5.64:1 | AA | Lc 77.9 | Fine for body text |
| #405FCB text on black | 3.71:1 | AA large text | Lc -23.9 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#A9BFF7
oklch(80.8% 0.083 267.9)
-
Step 400
400
#7D9CF3
oklch(70.6% 0.132 268.1)
-
Step 500
500
#5E81EF
oklch(63.2% 0.169 268)
-
Step 600
600
#4667DD
oklch(55.5% 0.184 268.1)
-
Step 700
700 (this color)
#405FCB
oklch(52.3% 0.171 267.9)
-
Step 800
800
#2E469B
oklch(42.6% 0.142 268)
-
Step 900
900
#283C7C
oklch(37.7% 0.111 267.7)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#405FCB 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) | #126ECF | 0.044 |
| Deuteranopia (no green cones) | #0061C9 | 0.038 |
| Tritanopia (no blue cones) | #00798C | 0.139 |
| Achromatopsia (no color) | #676767 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405FCB
#405FCB
oklch(52.3% 0.171 267.9)
- #846500
#846500
oklch(52.3% 0.107 87.5)
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 #405FCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.033
- Royal Blue #4169E1 ΔE 0.041
- Iris #6258C4 ΔE 0.046
- Dark Periwinkle #665FD1 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.054
- Neon Blue #4361EE ΔE 0.054
- Slate Blue #6A5ACD ΔE 0.056
- Azul #1D5DEC ΔE 0.057
Use #405FCB 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.