#024577
Closest named color: Twilight Blue (#0A437A). oklch(38.2% 0.104 248.8), rgb(2, 69, 119).
Aa
White text reads best on this color (9.90:1).
About this color
#024577 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.104 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.009 away. White text reads best on it, at 9.90:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.12:1 |
| White text | 9.90:1 |
Values
| HEX | #024577 |
| RGB | rgb(2, 69, 119) |
| HSL | hsl(206, 97%, 24%) |
| OKLCH | oklch(38.2% 0.104 248.8) |
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 #024577 | 9.90:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #024577 | 2.12:1 | Fails | Lc 11.5 | Not readable |
| #024577 text on white | 9.90:1 | AAA | Lc 92.4 | Preferred for body text |
| #024577 text on black | 2.12:1 | Fails | Lc -10.0 | 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
#DFECF9
oklch(93.7% 0.022 248.1)
-
Step 200
200
#C4DCF5
oklch(88.5% 0.043 249.4)
-
Step 300
300
#9AC5F1
oklch(80.8% 0.078 249.4)
-
Step 400
400
#5EA6EA
oklch(70.7% 0.124 248.7)
-
Step 500
500
#248EE4
oklch(63.2% 0.158 248.7)
-
Step 600
600
#0076C7
oklch(55.5% 0.153 248.9)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518B
oklch(42.6% 0.117 248.8)
-
Step 900
900 (this color)
#024577
oklch(38.2% 0.104 248.8)
-
Step 950
950
#062845
oklch(27% 0.066 248.8)
#024577 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) | #2C4879 | 0.033 |
| Deuteranopia (no green cones) | #183F76 | 0.019 |
| Tritanopia (no blue cones) | #005158 | 0.074 |
| Achromatopsia (no color) | #434343 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #024577
#024577
oklch(38.2% 0.104 248.8)
- #5F3900
#5F3900
oklch(38.2% 0.083 68.7)
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 #024577, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.009
- Light Navy #155084 ΔE 0.040
- Marine Blue #01386A ΔE 0.043
- Cobalt #1E488F ΔE 0.045
- Deep Sea Blue #015482 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.054
- Dusk Blue #26538D ΔE 0.061
- Charcoal #264653 ΔE 0.066
Use #024577 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.