#1FA4F5
Closest named color: Chefchaouen Blue (#4895EF). oklch(69.1% 0.159 243), rgb(31, 164, 245).
Aa
Black text reads best on this color (7.68:1).
About this color
#1FA4F5 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.159 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.041 away. Black text reads best on it, at 7.68:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.68:1 |
| White text | 2.73:1 |
Values
| HEX | #1FA4F5 |
| RGB | rgb(31, 164, 245) |
| HSL | hsl(203, 91%, 54%) |
| OKLCH | oklch(69.1% 0.159 243) |
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 #1FA4F5 | 2.73:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #1FA4F5 | 7.68:1 | AAA | Lc 51.7 | Large or bold text, headings |
| #1FA4F5 text on white | 2.73:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #1FA4F5 text on black | 7.68:1 | AAA | Lc -49.6 | 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
#DAEDFC
oklch(93.7% 0.029 241.6)
-
Step 200
200
#BBDEFB
oklch(88.5% 0.055 243.4)
-
Step 300
300
#87C8FC
oklch(80.9% 0.099 243.6)
-
Step 400
400 (this color)
#1FA4F5
oklch(69.1% 0.159 243)
-
Step 500
500
#0091DD
oklch(63.1% 0.152 242.9)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#00466E
oklch(37.8% 0.091 242.8)
-
Step 950
950
#002943
oklch(27% 0.065 242.6)
#1FA4F5 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) | #7DA7F8 | 0.071 |
| Deuteranopia (no green cones) | #6094F4 | 0.053 |
| Tritanopia (no blue cones) | #00B8C1 | 0.108 |
| Achromatopsia (no color) | #9C9C9C | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1FA4F5
#1FA4F5
oklch(69.1% 0.159 243)
- #DE8200
#DE8200
oklch(69.1% 0.157 63.1)
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 #1FA4F5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.041
- Cornflower Blue #6495ED ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.059
- Deep Sky Blue #00BFFF ΔE 0.072
- Soft Blue #6488EA ΔE 0.079
- Turquoise Blue #06B1C4 ΔE 0.091
- Water Blue #0E87CC ΔE 0.094
Use #1FA4F5 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.