#1D4EBF
Closest named color: Blue Blue (#2242C7). oklch(46.6% 0.185 263.3), rgb(29, 78, 191).
Aa
White text reads best on this color (7.25:1).
About this color
#1D4EBF is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.185 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.029 away. White text reads best on it, at 7.25:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.185) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #1D4EBF |
| RGB | rgb(29, 78, 191) |
| HSL | hsl(222, 74%, 43%) |
| OKLCH | oklch(46.6% 0.185 263.3) |
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 #1D4EBF | 7.25:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #1D4EBF | 2.89:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #1D4EBF text on white | 7.25:1 | AAA | Lc 84.5 | Fine for body text |
| #1D4EBF text on black | 2.89:1 | Fails | Lc -17.5 | 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
#719EFA
oklch(70.7% 0.144 263.4)
-
Step 500
500
#4C83F7
oklch(63.2% 0.183 263.1)
-
Step 600
600
#3168E6
oklch(55.5% 0.2 263.5)
-
Step 700
700 (this color)
#1D4EBF
oklch(46.6% 0.185 263.3)
-
Step 800
800
#1F47A1
oklch(42.6% 0.153 263.3)
-
Step 900
900
#1E3D80
oklch(37.7% 0.119 263.2)
-
Step 950
950
#12244B
oklch(26.9% 0.076 263.5)
#1D4EBF 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) | #005EC3 | 0.039 |
| Deuteranopia (no green cones) | #0050BD | 0.012 |
| Tritanopia (no blue cones) | #006B7F | 0.142 |
| Achromatopsia (no color) | #575757 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4EBF
#1D4EBF
oklch(46.6% 0.185 263.3)
- #735400
#735400
oklch(46.6% 0.096 83.8)
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 #1D4EBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.029
- Majorelle Blue #3F37C9 ΔE 0.055
- Sapphire #2138AB ΔE 0.060
- Blue With A Hint Of Purple #533CC6 ΔE 0.069
- Warm Blue #4B57DB ΔE 0.071
- Blurple #5539CC ΔE 0.075
- Cobalt #1E488F ΔE 0.078
- Azul #1D5DEC ΔE 0.079
Use #1D4EBF 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.