#1F5AC4
Closest named color: Mid Blue (#276AB3). oklch(49.5% 0.177 261.1), rgb(31, 90, 196).
Aa
White text reads best on this color (6.32:1).
About this color
#1F5AC4 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.177 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.054 away. White text reads best on it, at 6.32:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.31:1 |
| White text | 6.32:1 |
Values
| HEX | #1F5AC4 |
| RGB | rgb(31, 90, 196) |
| HSL | hsl(219, 73%, 45%) |
| OKLCH | oklch(49.5% 0.177 261.1) |
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 #1F5AC4 | 6.32:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #1F5AC4 | 3.31:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #1F5AC4 text on white | 6.32:1 | AA | Lc 80.9 | Fine for body text |
| #1F5AC4 text on black | 3.31:1 | AA large text | Lc -21.0 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAF9
oklch(88.5% 0.047 261.4)
-
Step 300
300
#A2C2F8
oklch(81% 0.084 260.7)
-
Step 400
400
#6FA0F5
oklch(70.8% 0.136 260.8)
-
Step 500
500
#4885F2
oklch(63.1% 0.176 261)
-
Step 600
600
#2B6BE0
oklch(55.5% 0.19 261.2)
-
Step 700
700 (this color)
#1F5AC4
oklch(49.5% 0.177 261.1)
-
Step 800
800
#1B499D
oklch(42.6% 0.146 261.2)
-
Step 900
900
#1C3E7D
oklch(37.6% 0.114 261.4)
-
Step 950
950
#112549
oklch(27% 0.072 261.1)
#1F5AC4 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) | #0067C8 | 0.033 |
| Deuteranopia (no green cones) | #0059C2 | 0.013 |
| Tritanopia (no blue cones) | #007486 | 0.135 |
| Achromatopsia (no color) | #606060 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F5AC4
#1F5AC4
oklch(49.5% 0.177 261.1)
- #7F5A00
#7F5A00
oklch(49.4% 0.102 80.7)
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 #1F5AC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.054
- Blue Blue #2242C7 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.056
- Azul #1D5DEC ΔE 0.062
- Royal Blue #4169E1 ΔE 0.068
- French Blue #436BAD ΔE 0.072
- Iris #6258C4 ΔE 0.075
- Neon Blue #4361EE ΔE 0.076
Use #1F5AC4 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.