#3660D0
Closest named color: Warm Blue (#4B57DB). oklch(52.4% 0.18 265.2), rgb(54, 96, 208).
Aa
White text reads best on this color (5.61:1).
About this color
#3660D0 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.180 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.034 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.74:1 |
| White text | 5.61:1 |
Values
| HEX | #3660D0 |
| RGB | rgb(54, 96, 208) |
| HSL | hsl(224, 62%, 51%) |
| OKLCH | oklch(52.4% 0.18 265.2) |
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 #3660D0 | 5.61:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #3660D0 | 3.74:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #3660D0 text on white | 5.61:1 | AA | Lc 77.6 | Fine for body text |
| #3660D0 text on black | 3.74:1 | AA large text | Lc -24.2 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CBD9F8
oklch(88.5% 0.045 266.2)
-
Step 300
300
#A7C0F6
oklch(80.8% 0.082 265.3)
-
Step 400
400
#799EF1
oklch(70.7% 0.129 265)
-
Step 500
500
#5883EC
oklch(63.1% 0.165 265.2)
-
Step 600
600 (this color)
#3660D0
oklch(52.4% 0.18 265.2)
-
Step 700
700
#3157BE
oklch(49% 0.168 265.3)
-
Step 800
800
#29489A
oklch(42.7% 0.139 265.3)
-
Step 900
900
#253D7A
oklch(37.6% 0.108 265.4)
-
Step 950
950
#162447
oklch(26.9% 0.068 265.6)
#3660D0 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) | #006FD4 | 0.041 |
| Deuteranopia (no green cones) | #0061CE | 0.028 |
| Tritanopia (no blue cones) | #007B8F | 0.141 |
| Achromatopsia (no color) | #686868 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3660D0
#3660D0
oklch(52.4% 0.18 265.2)
- #866400
#866400
oklch(52.4% 0.107 85.2)
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 #3660D0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.034
- Royal Blue #4169E1 ΔE 0.037
- Azul #1D5DEC ΔE 0.047
- Neon Blue #4361EE ΔE 0.049
- Cerulean Blue #056EEE ΔE 0.056
- Mid Blue #276AB3 ΔE 0.056
- Iris #6258C4 ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.059
Use #3660D0 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.