#247A9D
Closest named color: Ocean (#017B92). oklch(54.5% 0.096 229.9), rgb(36, 122, 157).
Aa
White text reads best on this color (4.83:1).
About this color
#247A9D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.096 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.023 away. White text reads best on it, at 4.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.34:1 |
| White text | 4.83:1 |
Values
| HEX | #247A9D |
| RGB | rgb(36, 122, 157) |
| HSL | hsl(197, 63%, 38%) |
| OKLCH | oklch(54.5% 0.096 229.9) |
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 #247A9D | 4.83:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #247A9D | 4.34:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #247A9D text on white | 4.83:1 | AA | Lc 73.2 | Content text, not long reading |
| #247A9D text on black | 4.34:1 | AA large text | Lc -28.5 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#CADCE6
oklch(88.4% 0.024 231.9)
-
Step 300
300
#A5C6D7
oklch(80.8% 0.043 230.3)
-
Step 400
400
#73A9C3
oklch(70.7% 0.068 229.7)
-
Step 500
500
#4B93B4
oklch(63% 0.087 230.1)
-
Step 600
600 (this color)
#247A9D
oklch(54.5% 0.096 229.9)
-
Step 700
700
#196989
oklch(49% 0.089 230.3)
-
Step 800
800
#19566F
oklch(42.7% 0.073 229.7)
-
Step 900
900
#1C475A
oklch(37.7% 0.057 230)
-
Step 950
950
#122A35
oklch(27.1% 0.036 229.8)
#247A9D 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) | #68789F | 0.066 |
| Deuteranopia (no green cones) | #586D9D | 0.056 |
| Tritanopia (no blue cones) | #008486 | 0.056 |
| Achromatopsia (no color) | #727272 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #247A9D
#247A9D
oklch(54.5% 0.096 229.9)
- #9C5E3A
#9C5E3A
oklch(54.4% 0.096 49.9)
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 #247A9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.023
- Sea Blue #047495 ΔE 0.025
- Cerulean #457B9D ΔE 0.026
- Muted Blue #3B719F ΔE 0.030
- Dull Blue #49759C ΔE 0.030
- Nice Blue #107AB0 ΔE 0.030
- Ocean Blue #03719C ΔE 0.032
- Flat Blue #3C73A8 ΔE 0.034
Use #247A9D 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.