#3A5FD9
Closest named color: Warm Blue (#4B57DB). oklch(53.1% 0.192 266.8), rgb(58, 95, 217).
Aa
White text reads best on this color (5.49:1).
About this color
#3A5FD9 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.192 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.024 away. White text reads best on it, at 5.49:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.81:1 |
| White text | 5.49:1 |
Values
| HEX | #3A5FD9 |
| RGB | rgb(58, 95, 217) |
| HSL | hsl(226, 68%, 54%) |
| OKLCH | oklch(53.1% 0.192 266.8) |
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 #3A5FD9 | 5.49:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #3A5FD9 | 3.81:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #3A5FD9 text on white | 5.49:1 | AA | Lc 76.9 | Fine for body text |
| #3A5FD9 text on black | 3.81:1 | AA large text | Lc -24.8 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A7C0F9
oklch(80.9% 0.086 266.1)
-
Step 400
400
#799CF7
oklch(70.6% 0.139 266.9)
-
Step 500
500
#5981F3
oklch(63.2% 0.176 266.8)
-
Step 600
600 (this color)
#3A5FD9
oklch(53.1% 0.192 266.8)
-
Step 700
700
#3355C4
oklch(49.2% 0.178 266.7)
-
Step 800
800
#2A469E
oklch(42.6% 0.147 266.7)
-
Step 900
900
#263C7E
oklch(37.7% 0.115 266.9)
-
Step 950
950
#16244A
oklch(27.1% 0.073 266.4)
#3A5FD9 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) | #0071DD | 0.047 |
| Deuteranopia (no green cones) | #0062D7 | 0.031 |
| Tritanopia (no blue cones) | #007D93 | 0.152 |
| Achromatopsia (no color) | #696969 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5FD9
#3A5FD9
oklch(53.1% 0.192 266.8)
- #876700
#876700
oklch(53.1% 0.109 87.2)
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 #3A5FD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.024
- Royal Blue #4169E1 ΔE 0.029
- Neon Blue #4361EE ΔE 0.034
- Azul #1D5DEC ΔE 0.036
- Cerulean Blue #056EEE ΔE 0.049
- Dark Periwinkle #665FD1 ΔE 0.056
- Bright Blue #0165FC ΔE 0.059
- Iris #6258C4 ΔE 0.059
Use #3A5FD9 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.