#0B497B
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.103 249.1), rgb(11, 73, 123).
Aa
White text reads best on this color (9.31:1).
About this color
#0B497B is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.103 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.018 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #0B497B |
| RGB | rgb(11, 73, 123) |
| HSL | hsl(207, 84%, 26%) |
| OKLCH | oklch(39.7% 0.103 249.1) |
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 #0B497B | 9.31:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #0B497B | 2.25:1 | Fails | Lc 12.9 | Not readable |
| #0B497B text on white | 9.31:1 | AAA | Lc 91.1 | Preferred for body text |
| #0B497B text on black | 2.25:1 | Fails | Lc -11.3 | 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
#DFEBF9
oklch(93.5% 0.023 252.2)
-
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
#5FA6EA
oklch(70.7% 0.123 249)
-
Step 500
500
#278EE3
oklch(63.2% 0.156 248.8)
-
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)
#0B497B
oklch(39.7% 0.103 249.1)
-
Step 950
950
#072844
oklch(27% 0.064 248.5)
#0B497B 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) | #304C7D | 0.033 |
| Deuteranopia (no green cones) | #1F427A | 0.022 |
| Tritanopia (no blue cones) | #00555C | 0.073 |
| Achromatopsia (no color) | #474747 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B497B
#0B497B
oklch(39.7% 0.103 249.1)
- #643D00
#643D00
oklch(39.7% 0.086 69.6)
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 #0B497B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.018
- Light Navy #155084 ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.033
- Cobalt #1E488F ΔE 0.037
- Dusk Blue #26538D ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.056
- Marine Blue #01386A ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.063
Use #0B497B 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.