#184E9C
Closest named color: Cobalt (#1E488F). oklch(43.6% 0.139 258.5), rgb(24, 78, 156).
Aa
White text reads best on this color (8.05:1).
About this color
#184E9C is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.139 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.025 away. White text reads best on it, at 8.05:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.60:1 |
| White text | 8.05:1 |
Values
| HEX | #184E9C |
| RGB | rgb(24, 78, 156) |
| HSL | hsl(215, 73%, 35%) |
| OKLCH | oklch(43.6% 0.139 258.5) |
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 #184E9C | 8.05:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #184E9C | 2.60:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #184E9C text on white | 8.05:1 | AAA | Lc 87.4 | Fine for body text |
| #184E9C text on black | 2.60:1 | Fails | Lc -14.7 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#A1C2F5
oklch(80.8% 0.081 259)
-
Step 400
400
#6DA1F1
oklch(70.7% 0.13 258.7)
-
Step 500
500
#4487EC
oklch(63% 0.167 258.5)
-
Step 600
600
#236EDA
oklch(55.5% 0.181 258.5)
-
Step 700
700
#155CBD
oklch(49.1% 0.167 258.2)
-
Step 800
800 (this color)
#184E9C
oklch(43.6% 0.139 258.5)
-
Step 900
900
#19407A
oklch(37.8% 0.108 258.5)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#184E9C 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) | #1F569F | 0.024 |
| Deuteranopia (no green cones) | #004B9A | 0.015 |
| Tritanopia (no blue cones) | #00616D | 0.107 |
| Achromatopsia (no color) | #505050 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #184E9C
#184E9C
oklch(43.6% 0.139 258.5)
- #6C4A00
#6C4A00
oklch(43.6% 0.091 78.5)
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 #184E9C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.025
- Dusk Blue #26538D ΔE 0.032
- Light Navy #155084 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.050
- Blueberry #464196 ΔE 0.056
- Light Navy Blue #2E5A88 ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.057
- Sapphire #2138AB ΔE 0.059
Use #184E9C 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.