#0071DD
Closest named color: Cerulean Blue (#056EEE). oklch(55.8% 0.186 255.3), rgb(0, 113, 221).
Aa
White text reads best on this color (4.76:1).
About this color
#0071DD is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.186 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.028 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #0071DD |
| RGB | rgb(0, 113, 221) |
| HSL | hsl(209, 100%, 43%) |
| OKLCH | oklch(55.8% 0.186 255.3) |
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 #0071DD | 4.76:1 | AA | Lc -77.7 | Fine for body text |
| Black text on #0071DD | 4.40:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #0071DD text on white | 4.76:1 | AA | Lc 72.3 | Content text, not long reading |
| #0071DD text on black | 4.40:1 | AA large text | Lc -29.4 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C5DBF8
oklch(88.4% 0.047 255.4)
-
Step 300
300
#9DC4F6
oklch(81% 0.083 254.9)
-
Step 400
400
#65A3F2
oklch(70.8% 0.133 255.2)
-
Step 500
500
#3689EE
oklch(63.1% 0.171 255.4)
-
Step 600
600 (this color)
#0071DD
oklch(55.8% 0.186 255.3)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900
#0E417B
oklch(37.8% 0.111 255.1)
-
Step 950
950
#0B2648
oklch(26.9% 0.071 255.8)
#0071DD 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) | #2C7CE1 | 0.036 |
| Deuteranopia (no green cones) | #006ADB | 0.018 |
| Tritanopia (no blue cones) | #008C9C | 0.140 |
| Achromatopsia (no color) | #737373 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0071DD
#0071DD
oklch(55.8% 0.186 255.3)
- #9B6800
#9B6800
oklch(55.7% 0.117 75.3)
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 #0071DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.028
- Royal Blue #4169E1 ΔE 0.036
- Azul #1D5DEC ΔE 0.054
- Clear Blue #247AFD ΔE 0.055
- Neon Blue #4361EE ΔE 0.056
- Bright Blue #0165FC ΔE 0.056
- Windows Blue #3778BF ΔE 0.058
- Mid Blue #276AB3 ΔE 0.065
Use #0071DD 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.