#1C4FBF
Closest named color: Blue Blue (#2242C7). oklch(46.7% 0.184 262.9), rgb(28, 79, 191).
Aa
White text reads best on this color (7.19:1).
About this color
#1C4FBF is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.184 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.031 away. White text reads best on it, at 7.19:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.92:1 |
| White text | 7.19:1 |
Values
| HEX | #1C4FBF |
| RGB | rgb(28, 79, 191) |
| HSL | hsl(221, 74%, 43%) |
| OKLCH | oklch(46.7% 0.184 262.9) |
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 #1C4FBF | 7.19:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #1C4FBF | 2.92:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #1C4FBF text on white | 7.19:1 | AAA | Lc 84.3 | Fine for body text |
| #1C4FBF text on black | 2.92:1 | Fails | Lc -17.7 | 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
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FB
oklch(80.9% 0.089 262.7)
-
Step 400
400
#709EF9
oklch(70.6% 0.143 262.9)
-
Step 500
500
#4B83F6
oklch(63.1% 0.182 262.8)
-
Step 600
600
#2F69E5
oklch(55.6% 0.198 262.8)
-
Step 700
700 (this color)
#1C4FBF
oklch(46.7% 0.184 262.9)
-
Step 800
800
#1E47A1
oklch(42.6% 0.153 263.1)
-
Step 900
900
#1D3D80
oklch(37.7% 0.12 262.8)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#1C4FBF 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) | #005FC3 | 0.039 |
| Deuteranopia (no green cones) | #0050BD | 0.012 |
| Tritanopia (no blue cones) | #006C7F | 0.143 |
| Achromatopsia (no color) | #575757 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C4FBF
#1C4FBF
oklch(46.7% 0.184 262.9)
- #745400
#745400
oklch(46.7% 0.096 83)
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 #1C4FBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.031
- Majorelle Blue #3F37C9 ΔE 0.057
- Sapphire #2138AB ΔE 0.062
- Blue With A Hint Of Purple #533CC6 ΔE 0.070
- Warm Blue #4B57DB ΔE 0.071
- Blurple #5539CC ΔE 0.076
- Mid Blue #276AB3 ΔE 0.078
- Azul #1D5DEC ΔE 0.078
Use #1C4FBF 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.