#0665EE
Closest named color: Azul (#1D5DEC). oklch(54.8% 0.221 260.1), rgb(6, 101, 238).
Aa
White text reads best on this color (5.11:1).
About this color
#0665EE is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.221 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Azul (#1D5DEC), ΔE 0.018 away. White text reads best on it, at 5.11:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.221) |
| Temperature | cool |
| Nearest name | Azul (#1D5DEC) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #0665EE |
| RGB | rgb(6, 101, 238) |
| HSL | hsl(215, 95%, 48%) |
| OKLCH | oklch(54.8% 0.221 260.1) |
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 #0665EE | 5.11:1 | AA | Lc -79.7 | Fine for body text |
| Black text on #0665EE | 4.10:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #0665EE text on white | 5.11:1 | AA | Lc 74.3 | Content text, not long reading |
| #0665EE text on black | 4.10:1 | AA large text | Lc -27.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C4DAFE
oklch(88.4% 0.055 260.3)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#669FFF
oklch(70.7% 0.154 260.3)
-
Step 500
500
#3983FF
oklch(63.1% 0.199 260.2)
-
Step 600
600 (this color)
#0665EE
oklch(54.8% 0.221 260.1)
-
Step 700
700
#0056D0
oklch(49.2% 0.201 260.1)
-
Step 800
800
#0547AA
oklch(42.8% 0.17 260.1)
-
Step 900
900
#103D86
oklch(37.7% 0.132 260)
-
Step 950
950
#0B244F
oklch(27% 0.085 260.5)
#0665EE 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) | #0078F3 | 0.047 |
| Deuteranopia (no green cones) | #0064EB | 0.006 |
| Tritanopia (no blue cones) | #0088A0 | 0.166 |
| Achromatopsia (no color) | #6E6E6E | 0.221 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0665EE
#0665EE
oklch(54.8% 0.221 260.1)
- #936800
#936800
oklch(54.8% 0.113 80.1)
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 #0665EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Azul #1D5DEC ΔE 0.018
- Bright Blue #0165FC ΔE 0.021
- Cerulean Blue #056EEE ΔE 0.022
- Neon Blue #4361EE ΔE 0.035
- Royal Blue #4169E1 ΔE 0.041
- Electric Blue #0652FF ΔE 0.047
- Warm Blue #4B57DB ΔE 0.057
- Clear Blue #247AFD ΔE 0.059
Use #0665EE 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.