#318DCD
Closest named color: Water Blue (#0E87CC). oklch(61.9% 0.129 243.5), rgb(49, 141, 205).
Aa
Black text reads best on this color (5.82:1).
About this color
#318DCD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.129 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.024 away. Black text reads best on it, at 5.82:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.82:1 |
| White text | 3.60:1 |
Values
| HEX | #318DCD |
| RGB | rgb(49, 141, 205) |
| HSL | hsl(205, 61%, 50%) |
| OKLCH | oklch(61.9% 0.129 243.5) |
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 #318DCD | 3.60:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #318DCD | 5.82:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #318DCD text on white | 3.60:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #318DCD text on black | 5.82:1 | AA | Lc -38.4 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DCEF
oklch(88.4% 0.035 244.2)
-
Step 300
300
#9EC6E7
oklch(80.9% 0.063 243.5)
-
Step 400
400
#66A8DB
oklch(70.8% 0.101 243.2)
-
Step 500
500 (this color)
#318DCD
oklch(61.9% 0.129 243.5)
-
Step 600
600
#007ABC
oklch(55.7% 0.136 243.3)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#0D456A
oklch(37.6% 0.084 243.6)
-
Step 950
950
#0B293E
oklch(27% 0.053 242.9)
#318DCD 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) | #6F8FD0 | 0.058 |
| Deuteranopia (no green cones) | #5A80CC | 0.045 |
| Tritanopia (no blue cones) | #009DA4 | 0.090 |
| Achromatopsia (no color) | #878787 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #318DCD
#318DCD
oklch(61.9% 0.129 243.5)
- #BB7320
#BB7320
oklch(62% 0.129 63.9)
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 #318DCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.024
- Cool Blue #4984B8 ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.039
- Steel Blue #4682B4 ΔE 0.043
- Blue NCS #118AB2 ΔE 0.045
- Faded Blue #658CBB ΔE 0.050
- Off Blue #5684AE ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.054
Use #318DCD 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.