#1F74F3
Closest named color: Cerulean Blue (#056EEE). oklch(58.5% 0.207 259.3), rgb(31, 116, 243).
Aa
Black text reads best on this color (4.85:1).
About this color
#1F74F3 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.207 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.020 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.207) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #1F74F3 |
| RGB | rgb(31, 116, 243) |
| HSL | hsl(216, 90%, 54%) |
| OKLCH | oklch(58.5% 0.207 259.3) |
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 #1F74F3 | 4.32:1 | AA large text | Lc -74.8 | Content text, not long reading |
| Black text on #1F74F3 | 4.85:1 | AA | Lc 34.8 | Non-text elements, placeholder text |
| #1F74F3 text on white | 4.32:1 | AA large text | Lc 69.3 | Content text, not long reading |
| #1F74F3 text on black | 4.85:1 | AA | Lc -32.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C5DBFC
oklch(88.6% 0.051 258.4)
-
Step 300
300
#9DC2FD
oklch(80.9% 0.093 259.6)
-
Step 400
400
#66A0FC
oklch(70.7% 0.149 259.3)
-
Step 500
500
#3A85FA
oklch(63.2% 0.19 259.2)
-
Step 600
600 (this color)
#1F74F3
oklch(58.5% 0.207 259.3)
-
Step 700
700
#0158CB
oklch(49.2% 0.193 259.3)
-
Step 800
800
#0949A4
oklch(42.8% 0.159 259.3)
-
Step 900
900
#123E82
oklch(37.7% 0.124 259.3)
-
Step 950
950
#0C254C
oklch(27% 0.079 259.2)
#1F74F3 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) | #0883F8 | 0.037 |
| Deuteranopia (no green cones) | #0071F1 | 0.013 |
| Tritanopia (no blue cones) | #0093A8 | 0.157 |
| Achromatopsia (no color) | #797979 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F74F3
#1F74F3
oklch(58.5% 0.207 259.3)
- #A27200
#A27200
oklch(58.6% 0.122 79.3)
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 #1F74F3, closest first.
No curated palette has a color within ΔE 0.04 of #1F74F3.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.020
- Clear Blue #247AFD ΔE 0.021
- Royal Blue #4169E1 ΔE 0.039
- Bright Blue #0165FC ΔE 0.041
- Neon Blue #4361EE ΔE 0.047
- Azul #1D5DEC ΔE 0.056
- Cornflower #6A79F7 ΔE 0.071
- Dodger Blue #1E90FF ΔE 0.072
Use #1F74F3 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.