#1F7ADD
Closest named color: Cerulean Blue (#056EEE). oklch(58.2% 0.172 254.6), rgb(31, 122, 221).
Aa
Black text reads best on this color (4.88:1).
About this color
#1F7ADD is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.172 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.044 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.88:1 |
| White text | 4.29:1 |
Values
| HEX | #1F7ADD |
| RGB | rgb(31, 122, 221) |
| HSL | hsl(211, 75%, 49%) |
| OKLCH | oklch(58.2% 0.172 254.6) |
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 #1F7ADD | 4.29:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #1F7ADD | 4.88:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #1F7ADD text on white | 4.29:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #1F7ADD text on black | 4.88:1 | AA | Lc -32.5 | Non-text elements, placeholder text |
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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF6
oklch(88.4% 0.044 254.8)
-
Step 300
300
#9FC4F2
oklch(81% 0.077 254.1)
-
Step 400
400
#69A3EC
oklch(70.6% 0.124 254.8)
-
Step 500
500
#3D8AE6
oklch(63.1% 0.158 254.8)
-
Step 600
600 (this color)
#1F7ADD
oklch(58.2% 0.172 254.6)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#094E95
oklch(42.7% 0.132 254.6)
-
Step 900
900
#134277
oklch(37.8% 0.103 254.4)
-
Step 950
950
#0D2745
oklch(27% 0.064 254)
#1F7ADD 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) | #4583E1 | 0.038 |
| Deuteranopia (no green cones) | #1572DB | 0.022 |
| Tritanopia (no blue cones) | #0092A1 | 0.128 |
| Achromatopsia (no color) | #7A7A7A | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F7ADD
#1F7ADD
oklch(58.2% 0.172 254.6)
- #A56E00
#A56E00
oklch(58.2% 0.123 74.5)
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 #1F7ADD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.044
- Royal Blue #4169E1 ΔE 0.046
- Windows Blue #3778BF ΔE 0.046
- Water Blue #0E87CC ΔE 0.048
- Clear Blue #247AFD ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.063
- Neon Blue #4361EE ΔE 0.069
- Nice Blue #107AB0 ΔE 0.071
Use #1F7ADD 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.