#1F71DD
Closest named color: Cerulean Blue (#056EEE). oklch(56.2% 0.182 257.5), rgb(31, 113, 221).
Aa
White text reads best on this color (4.70:1).
About this color
#1F71DD is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.182 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.029 away. White text reads best on it, at 4.70:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #1F71DD |
| RGB | rgb(31, 113, 221) |
| HSL | hsl(214, 75%, 49%) |
| OKLCH | oklch(56.2% 0.182 257.5) |
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 #1F71DD | 4.70:1 | AA | Lc -77.5 | Fine for body text |
| Black text on #1F71DD | 4.46:1 | AA large text | Lc 32.0 | Non-text elements, placeholder text |
| #1F71DD text on white | 4.70:1 | AA | Lc 72.1 | Content text, not long reading |
| #1F71DD text on black | 4.46:1 | AA large text | Lc -29.6 | 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
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A0C3F6
oklch(81% 0.082 257.7)
-
Step 400
400
#6AA2F1
oklch(70.7% 0.131 257.1)
-
Step 500
500
#4088EC
oklch(63.1% 0.167 257.3)
-
Step 600
600 (this color)
#1F71DD
oklch(56.2% 0.182 257.5)
-
Step 700
700
#0D5CBE
oklch(49.1% 0.17 257.6)
-
Step 800
800
#104C9A
oklch(42.8% 0.141 257.5)
-
Step 900
900
#16407A
oklch(37.7% 0.109 257.5)
-
Step 950
950
#0E2647
oklch(27% 0.068 257.1)
#1F71DD 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) | #2E7CE1 | 0.032 |
| Deuteranopia (no green cones) | #006CDB | 0.018 |
| Tritanopia (no blue cones) | #008B9C | 0.138 |
| Achromatopsia (no color) | #747474 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F71DD
#1F71DD
oklch(56.2% 0.182 257.5)
- #9B6B00
#9B6B00
oklch(56.3% 0.118 77.7)
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 #1F71DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.029
- Royal Blue #4169E1 ΔE 0.029
- Neon Blue #4361EE ΔE 0.051
- Clear Blue #247AFD ΔE 0.053
- Windows Blue #3778BF ΔE 0.055
- Azul #1D5DEC ΔE 0.055
- Bright Blue #0165FC ΔE 0.058
- Mid Blue #276AB3 ΔE 0.065
Use #1F71DD 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.