#4038AE
Closest named color: Sapphire (#2138AB). oklch(42.8% 0.18 278.6), rgb(64, 56, 174).
Aa
White text reads best on this color (8.76:1).
About this color
#4038AE is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.180 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.040 away. White text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.39:1 |
| White text | 8.76:1 |
Values
| HEX | #4038AE |
| RGB | rgb(64, 56, 174) |
| HSL | hsl(244, 51%, 45%) |
| OKLCH | oklch(42.8% 0.18 278.6) |
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 #4038AE | 8.76:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #4038AE | 2.39:1 | Fails | Lc 14.6 | Not readable |
| #4038AE text on white | 8.76:1 | AAA | Lc 89.4 | Fine for body text |
| #4038AE text on black | 2.39:1 | Fails | Lc -12.8 | Not readable |
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 800.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E5E8FF
oklch(93.6% 0.031 279.9)
-
Step 200
200
#D0D6FF
oklch(88.5% 0.057 278.6)
-
Step 300
300
#B2BBFF
oklch(81% 0.097 278.2)
-
Step 400
400
#8C94FF
oklch(70.7% 0.155 278.4)
-
Step 500
500
#7374FF
oklch(63.1% 0.202 278.6)
-
Step 600
600
#5E53F7
oklch(55.6% 0.235 278.5)
-
Step 700
700
#4F42D7
oklch(49.2% 0.217 278.7)
-
Step 800
800 (this color)
#4038AE
oklch(42.8% 0.18 278.6)
-
Step 900
900
#353289
oklch(37.6% 0.14 278.8)
-
Step 950
950
#1E1F50
oklch(27% 0.088 277.9)
#4038AE 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) | #004FB2 | 0.066 |
| Deuteranopia (no green cones) | #0046AC | 0.057 |
| Tritanopia (no blue cones) | #00576E | 0.150 |
| Achromatopsia (no color) | #4B4B4B | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4038AE
#4038AE
oklch(42.8% 0.18 278.6)
- #5C4F00
#5C4F00
oklch(42.8% 0.088 98.3)
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 #4038AE, closest first.
No curated palette has a color within ΔE 0.04 of #4038AE.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.040
- Majorelle Blue #3F37C9 ΔE 0.043
- Blueberry #464196 ΔE 0.046
- Blue With A Hint Of Purple #533CC6 ΔE 0.050
- Indigo Blue #3A18B1 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.055
- Blurple #5539CC ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.060
Use #4038AE 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.