#1F4FC7
Closest named color: Blue Blue (#2242C7). oklch(47.5% 0.194 263.9), rgb(31, 79, 199).
Aa
White text reads best on this color (6.99:1).
About this color
#1F4FC7 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.194 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.029 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #1F4FC7 |
| RGB | rgb(31, 79, 199) |
| HSL | hsl(223, 73%, 45%) |
| OKLCH | oklch(47.5% 0.194 263.9) |
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 #1F4FC7 | 6.99:1 | AA | Lc -88.5 | Fine for body text |
| Black text on #1F4FC7 | 3.00:1 | AA large text | Lc 20.5 | Dividers and decoration only |
| #1F4FC7 text on white | 6.99:1 | AA | Lc 83.5 | Fine for body text |
| #1F4FC7 text on black | 3.00:1 | AA large text | Lc -18.4 | 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 700.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8DAFD
oklch(88.6% 0.052 263.7)
-
Step 300
300
#A2C0FE
oklch(80.8% 0.094 264.4)
-
Step 400
400
#709DFE
oklch(70.7% 0.151 264.1)
-
Step 500
500
#4B81FC
oklch(63.1% 0.192 263.9)
-
Step 600
600
#3067EB
oklch(55.7% 0.208 263.8)
-
Step 700
700 (this color)
#1F4FC7
oklch(47.5% 0.194 263.9)
-
Step 800
800
#1E46A5
oklch(42.7% 0.16 263.7)
-
Step 900
900
#1D3C83
oklch(37.7% 0.125 263.7)
-
Step 950
950
#12244D
oklch(27.1% 0.079 264)
#1F4FC7 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) | #0061CB | 0.043 |
| Deuteranopia (no green cones) | #0052C5 | 0.014 |
| Tritanopia (no blue cones) | #006E83 | 0.150 |
| Achromatopsia (no color) | #595959 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4FC7
#1F4FC7
oklch(47.5% 0.194 263.9)
- #765600
#765600
oklch(47.4% 0.097 83.5)
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 #1F4FC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.029
- Majorelle Blue #3F37C9 ΔE 0.053
- Warm Blue #4B57DB ΔE 0.061
- Azul #1D5DEC ΔE 0.066
- Blue With A Hint Of Purple #533CC6 ΔE 0.067
- Sapphire #2138AB ΔE 0.070
- Blurple #5539CC ΔE 0.072
- Mid Blue #276AB3 ΔE 0.081
Use #1F4FC7 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.