#184CA5
Closest named color: Cobalt (#1E488F). oklch(43.8% 0.154 260.6), rgb(24, 76, 165).
Aa
White text reads best on this color (8.02:1).
About this color
#184CA5 is a dark, vivid blue. In OKLCH its lightness is 44%, its chroma 0.154 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.036 away. White text reads best on it, at 8.02:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.61:1 |
| White text | 8.02:1 |
Values
| HEX | #184CA5 |
| RGB | rgb(24, 76, 165) |
| HSL | hsl(218, 75%, 37%) |
| OKLCH | oklch(43.8% 0.154 260.6) |
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 #184CA5 | 8.02:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #184CA5 | 2.61:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #184CA5 text on white | 8.02:1 | AAA | Lc 87.2 | Fine for body text |
| #184CA5 text on black | 2.61:1 | Fails | Lc -14.9 | Not readable |
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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C7DAFB
oklch(88.5% 0.05 261.5)
-
Step 300
300
#9FC2FB
oklch(80.9% 0.09 260)
-
Step 400
400
#6BA0FA
oklch(70.8% 0.144 260.4)
-
Step 500
500
#4384F7
oklch(63.1% 0.185 260.8)
-
Step 600
600
#226BE6
oklch(55.7% 0.2 260.5)
-
Step 700
700
#1558C8
oklch(49.2% 0.186 260.6)
-
Step 800
800 (this color)
#184CA5
oklch(43.8% 0.154 260.6)
-
Step 900
900
#183E80
oklch(37.7% 0.12 260.6)
-
Step 950
950
#0F254B
oklch(27% 0.076 260.5)
#184CA5 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) | #0157A8 | 0.029 |
| Deuteranopia (no green cones) | #004AA3 | 0.013 |
| Tritanopia (no blue cones) | #006271 | 0.118 |
| Achromatopsia (no color) | #505050 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #184CA5
#184CA5
oklch(43.8% 0.154 260.6)
- #6C4C00
#6C4C00
oklch(44% 0.091 80.8)
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 #184CA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.036
- Dusk Blue #26538D ΔE 0.047
- Sapphire #2138AB ΔE 0.048
- Blueberry #464196 ΔE 0.057
- Light Navy #155084 ΔE 0.057
- Blue Blue #2242C7 ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.066
- Denim Blue #3B5B92 ΔE 0.067
Use #184CA5 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.