#4059DB
Closest named color: Warm Blue (#4B57DB). oklch(52.4% 0.2 269.8), rgb(64, 89, 219).
Aa
White text reads best on this color (5.72:1).
About this color
#4059DB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.200 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.013 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #4059DB |
| RGB | rgb(64, 89, 219) |
| HSL | hsl(230, 68%, 55%) |
| OKLCH | oklch(52.4% 0.2 269.8) |
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 #4059DB | 5.72:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #4059DB | 3.66:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #4059DB text on white | 5.72:1 | AA | Lc 78.1 | Fine for body text |
| #4059DB text on black | 3.66:1 | AA large text | Lc -23.7 | 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 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
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#AABEFC
oklch(80.9% 0.091 270.5)
-
Step 400
400
#7D9AFA
oklch(70.6% 0.144 269.7)
-
Step 500
500
#5F7EF7
oklch(63.1% 0.183 269.7)
-
Step 600
600 (this color)
#4059DB
oklch(52.4% 0.2 269.8)
-
Step 700
700
#3A51C8
oklch(49.1% 0.186 269.8)
-
Step 800
800
#3043A2
oklch(42.7% 0.155 270)
-
Step 900
900
#293A80
oklch(37.6% 0.12 269.6)
-
Step 950
950
#18234B
oklch(27.1% 0.075 269.3)
#4059DB 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) | #006EDF | 0.055 |
| Deuteranopia (no green cones) | #005FD8 | 0.038 |
| Tritanopia (no blue cones) | #007A91 | 0.161 |
| Achromatopsia (no color) | #666666 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4059DB
#4059DB
oklch(52.4% 0.2 269.8)
- #826600
#826600
oklch(52.3% 0.107 89.8)
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 #4059DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.013
- Neon Blue #4361EE ΔE 0.035
- Azul #1D5DEC ΔE 0.037
- Royal Blue #4169E1 ΔE 0.039
- Dark Periwinkle #665FD1 ΔE 0.057
- Iris #6258C4 ΔE 0.057
- Cerulean Blue #056EEE ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.061
Use #4059DB 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.