#405FBB
Closest named color: Mid Blue (#276AB3). oklch(51.2% 0.149 267), rgb(64, 95, 187).
Aa
White text reads best on this color (5.87:1).
About this color
#405FBB is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.149 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.038 away. White text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #405FBB |
| RGB | rgb(64, 95, 187) |
| HSL | hsl(225, 49%, 49%) |
| OKLCH | oklch(51.2% 0.149 267) |
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 #405FBB | 5.87:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #405FBB | 3.57:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #405FBB text on white | 5.87:1 | AA | Lc 79.1 | Fine for body text |
| #405FBB text on black | 3.57:1 | AA large text | Lc -22.7 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACC0F0
oklch(80.9% 0.072 267.1)
-
Step 400
400
#809EE9
oklch(70.7% 0.115 266.8)
-
Step 500
500
#6184E2
oklch(63.1% 0.147 266.8)
-
Step 600
600
#496BD0
oklch(55.6% 0.16 267.1)
-
Step 700
700 (this color)
#405FBB
oklch(51.2% 0.149 267)
-
Step 800
800
#304992
oklch(42.7% 0.124 266.9)
-
Step 900
900
#2A3E74
oklch(37.7% 0.096 266.6)
-
Step 950
950
#192544
oklch(27.1% 0.06 266.5)
#405FBB 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) | #2D6ABE | 0.031 |
| Deuteranopia (no green cones) | #0D5FB9 | 0.037 |
| Tritanopia (no blue cones) | #007484 | 0.123 |
| Achromatopsia (no color) | #646464 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #405FBB
#405FBB
oklch(51.2% 0.149 267)
- #806200
#806200
oklch(51.2% 0.105 87.6)
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 #405FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.038
- French Blue #436BAD ΔE 0.043
- Iris #6258C4 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.062
- Royal Blue #4169E1 ΔE 0.062
- Dusky Blue #475F94 ΔE 0.063
- Slate Blue #6A5ACD ΔE 0.064
Use #405FBB 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.