#1FA9FD
Closest named color: Chefchaouen Blue (#4895EF). oklch(70.6% 0.163 243.1), rgb(31, 169, 253).
Aa
Black text reads best on this color (8.15:1).
About this color
#1FA9FD is a medium-light, vivid blue. In OKLCH its lightness is 71%, its chroma 0.163 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.053 away. Black text reads best on it, at 8.15:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 8.15:1 |
| White text | 2.57:1 |
Values
| HEX | #1FA9FD |
| RGB | rgb(31, 169, 253) |
| HSL | hsl(203, 98%, 56%) |
| OKLCH | oklch(70.6% 0.163 243.1) |
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 #1FA9FD | 2.57:1 | Fails | Lc -54.9 | Large or bold text, headings |
| Black text on #1FA9FD | 8.15:1 | AAA | Lc 54.2 | Large or bold text, headings |
| #1FA9FD text on white | 2.57:1 | Fails | Lc 49.8 | Large or bold text, headings |
| #1FA9FD text on black | 8.15:1 | AAA | Lc -52.1 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF7FE
oklch(97.1% 0.013 241)
-
Step 100
100
#DAEDFD
oklch(93.7% 0.03 243.4)
-
Step 200
200
#BADEFC
oklch(88.4% 0.056 243.6)
-
Step 300
300
#85C8FE
oklch(80.8% 0.103 243.8)
-
Step 400
400 (this color)
#1FA9FD
oklch(70.6% 0.163 243.1)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#1FA9FD 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) | #81ACFF | 0.073 |
| Deuteranopia (no green cones) | #6299FB | 0.053 |
| Tritanopia (no blue cones) | #00BEC7 | 0.112 |
| Achromatopsia (no color) | #A1A1A1 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1FA9FD
#1FA9FD
oklch(70.6% 0.163 243.1)
- #E58600
#E58600
oklch(70.7% 0.161 63)
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 #1FA9FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.053
- Deep Sky Blue #00BFFF ΔE 0.059
- Cornflower Blue #6495ED ΔE 0.062
- Dodger Blue #1E90FF ΔE 0.068
- Dark Sky Blue #448EE4 ΔE 0.073
- Soft Blue #6488EA ΔE 0.089
- Periwinkle Blue #8F99FB ΔE 0.094
- Carolina Blue #8AB8FE ΔE 0.095
Use #1FA9FD 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.