#1D4EAC
Closest named color: Cobalt (#1E488F). oklch(45% 0.16 261.7), rgb(29, 78, 172).
Aa
White text reads best on this color (7.67:1).
About this color
#1D4EAC is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.160 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.049 away. White text reads best on it, at 7.67:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.160) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.73:1 |
| White text | 7.67:1 |
Values
| HEX | #1D4EAC |
| RGB | rgb(29, 78, 172) |
| HSL | hsl(219, 71%, 39%) |
| OKLCH | oklch(45% 0.16 261.7) |
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 #1D4EAC | 7.67:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #1D4EAC | 2.73:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #1D4EAC text on white | 7.67:1 | AAA | Lc 86.1 | Fine for body text |
| #1D4EAC text on black | 2.73:1 | Fails | Lc -16.0 | 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 800.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFC
oklch(88.5% 0.051 262.1)
-
Step 300
300
#9FC1FE
oklch(80.8% 0.094 261.9)
-
Step 400
400
#6B9FFD
oklch(70.8% 0.149 261.4)
-
Step 500
500
#4483FB
oklch(63.2% 0.191 261.8)
-
Step 600
600
#2568EA
oklch(55.5% 0.208 261.8)
-
Step 700
700
#1856CC
oklch(49.2% 0.193 261.7)
-
Step 800
800 (this color)
#1D4EAC
oklch(45% 0.16 261.7)
-
Step 900
900
#193D82
oklch(37.7% 0.124 261.8)
-
Step 950
950
#0F244C
oklch(26.9% 0.079 261.8)
#1D4EAC 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) | #005AAF | 0.031 |
| Deuteranopia (no green cones) | #004DAA | 0.014 |
| Tritanopia (no blue cones) | #006575 | 0.123 |
| Achromatopsia (no color) | #535353 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4EAC
#1D4EAC
oklch(45% 0.16 261.7)
- #6F4F00
#6F4F00
oklch(45% 0.093 81.6)
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 #1D4EAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.049
- Blue Blue #2242C7 ΔE 0.051
- Sapphire #2138AB ΔE 0.052
- Dusk Blue #26538D ΔE 0.054
- Blueberry #464196 ΔE 0.061
- Denim Blue #3B5B92 ΔE 0.067
- Light Navy #155084 ΔE 0.067
- Majorelle Blue #3F37C9 ΔE 0.072
Use #1D4EAC 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.