#024171
Closest named color: Twilight Blue (#0A437A). oklch(36.8% 0.1 249.1), rgb(2, 65, 113).
Aa
White text reads best on this color (10.51:1).
About this color
#024171 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.100 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.017 away. White text reads best on it, at 10.51:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.99:1 |
| White text | 10.51:1 |
Values
| HEX | #024171 |
| RGB | rgb(2, 65, 113) |
| HSL | hsl(206, 97%, 23%) |
| OKLCH | oklch(36.8% 0.1 249.1) |
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 #024171 | 10.51:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #024171 | 1.99:1 | Fails | Lc 10.1 | Not readable |
| #024171 text on white | 10.51:1 | AAA | Lc 93.9 | Preferred for body text |
| #024171 text on black | 1.99:1 | Fails | Lc -8.7 | 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 900.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9BC5F0
oklch(80.9% 0.076 249.4)
-
Step 400
400
#61A6E8
oklch(70.7% 0.12 248.9)
-
Step 500
500
#2C8EE1
oklch(63.2% 0.153 248.9)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900 (this color)
#024171
oklch(36.8% 0.1 249.1)
-
Step 950
950
#082844
oklch(27% 0.064 249)
#024171 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) | #294473 | 0.032 |
| Deuteranopia (no green cones) | #163B70 | 0.019 |
| Tritanopia (no blue cones) | #004D53 | 0.073 |
| Achromatopsia (no color) | #3F3F3F | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #024171
#024171
oklch(36.8% 0.1 249.1)
- #5A3600
#5A3600
oklch(36.8% 0.08 69.1)
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 #024171, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.017
- Marine Blue #01386A ΔE 0.029
- Dark Grey Blue #29465B ΔE 0.052
- Prussian Blue #1D3557 ΔE 0.053
- Light Navy #155084 ΔE 0.055
- Cobalt #1E488F ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.061
- Marine #042E60 ΔE 0.062
Use #024171 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.