#404FC9
Closest named color: Warm Blue (#4B57DB). oklch(49.1% 0.188 272.1), rgb(64, 79, 201).
Aa
White text reads best on this color (6.60:1).
About this color
#404FC9 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.188 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.038 away. White text reads best on it, at 6.60:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.17:1 |
| White text | 6.60:1 |
Values
| HEX | #404FC9 |
| RGB | rgb(64, 79, 201) |
| HSL | hsl(233, 56%, 52%) |
| OKLCH | oklch(49.1% 0.188 272.1) |
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 #404FC9 | 6.60:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #404FC9 | 3.17:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #404FC9 text on white | 6.60:1 | AA | Lc 82.1 | Fine for body text |
| #404FC9 text on black | 3.17:1 | AA large text | Lc -19.8 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ACBDFC
oklch(80.8% 0.091 272.6)
-
Step 400
400
#8199FB
oklch(70.7% 0.146 271.8)
-
Step 500
500
#657CF8
oklch(63.2% 0.186 272.1)
-
Step 600
600
#4E61E7
oklch(55.6% 0.202 272)
-
Step 700
700 (this color)
#404FC9
oklch(49.1% 0.188 272.1)
-
Step 800
800
#3442A2
oklch(42.7% 0.155 271.8)
-
Step 900
900
#2D3981
oklch(37.8% 0.121 272.2)
-
Step 950
950
#1A224B
oklch(27% 0.076 272.1)
#404FC9 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) | #0063CD | 0.056 |
| Deuteranopia (no green cones) | #0057C7 | 0.043 |
| Tritanopia (no blue cones) | #006E84 | 0.154 |
| Achromatopsia (no color) | #5D5D5D | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404FC9
#404FC9
oklch(49.1% 0.188 272.1)
- #755E00
#755E00
oklch(49.1% 0.1 92.1)
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 #404FC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.038
- Blue With A Hint Of Purple #533CC6 ΔE 0.045
- Blue Blue #2242C7 ΔE 0.048
- Blurple #5539CC ΔE 0.050
- Majorelle Blue #3F37C9 ΔE 0.050
- Bluey Purple #6241C7 ΔE 0.055
- Iris #6258C4 ΔE 0.056
- Azul #1D5DEC ΔE 0.065
Use #404FC9 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.