#3667DD
Closest named color: Royal Blue (#4169E1). oklch(54.8% 0.188 264.1), rgb(54, 103, 221).
Aa
White text reads best on this color (5.07:1).
About this color
#3667DD is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.188 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.014 away. White text reads best on it, at 5.07:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.14:1 |
| White text | 5.07:1 |
Values
| HEX | #3667DD |
| RGB | rgb(54, 103, 221) |
| HSL | hsl(222, 71%, 54%) |
| OKLCH | oklch(54.8% 0.188 264.1) |
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 #3667DD | 5.07:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #3667DD | 4.14:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #3667DD text on white | 5.07:1 | AA | Lc 74.5 | Content text, not long reading |
| #3667DD text on black | 4.14:1 | AA large text | Lc -27.2 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CADAF9
oklch(88.6% 0.046 263.7)
-
Step 300
300
#A5C1F8
oklch(81% 0.084 263.6)
-
Step 400
400
#759EF5
oklch(70.7% 0.136 264.1)
-
Step 500
500
#5283F1
oklch(63.1% 0.173 264)
-
Step 600
600 (this color)
#3667DD
oklch(54.8% 0.188 264.1)
-
Step 700
700
#2B57C2
oklch(49.1% 0.175 264.1)
-
Step 800
800
#24489D
oklch(42.7% 0.145 264)
-
Step 900
900
#223D7D
oklch(37.7% 0.114 264.4)
-
Step 950
950
#142449
oklch(26.9% 0.072 264.5)
#3667DD 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) | #0176E1 | 0.040 |
| Deuteranopia (no green cones) | #0067DB | 0.026 |
| Tritanopia (no blue cones) | #008498 | 0.149 |
| Achromatopsia (no color) | #6E6E6E | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3667DD
#3667DD
oklch(54.8% 0.188 264.1)
- #906A00
#906A00
oklch(54.8% 0.113 83.7)
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 #3667DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.014
- Neon Blue #4361EE ΔE 0.032
- Cerulean Blue #056EEE ΔE 0.034
- Azul #1D5DEC ΔE 0.039
- Warm Blue #4B57DB ΔE 0.040
- Bright Blue #0165FC ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.059
- Clear Blue #247AFD ΔE 0.064
Use #3667DD 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.