#30819F
Closest named color: Cerulean (#457B9D). oklch(56.7% 0.09 226.4), rgb(48, 129, 159).
Aa
Black text reads best on this color (4.76:1).
About this color
#30819F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.090 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.022 away. Black text reads best on it, at 4.76:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.76:1 |
| White text | 4.40:1 |
Values
| HEX | #30819F |
| RGB | rgb(48, 129, 159) |
| HSL | hsl(196, 54%, 41%) |
| OKLCH | oklch(56.7% 0.09 226.4) |
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 #30819F | 4.40:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #30819F | 4.76:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #30819F text on white | 4.40:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #30819F text on black | 4.76:1 | AA | Lc -31.4 | 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 600.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE5
oklch(88.6% 0.023 224.9)
-
Step 300
300
#A6C7D5
oklch(81% 0.041 225.4)
-
Step 400
400
#75A9C0
oklch(70.7% 0.064 227.4)
-
Step 500
500
#4D94B0
oklch(63.2% 0.083 226.1)
-
Step 600
600 (this color)
#30819F
oklch(56.7% 0.09 226.4)
-
Step 700
700
#1D6A85
oklch(49.1% 0.083 226.3)
-
Step 800
800
#1B566C
oklch(42.6% 0.069 226.9)
-
Step 900
900
#1E4758
oklch(37.6% 0.054 228)
-
Step 950
950
#132A33
oklch(27.1% 0.033 225.6)
#30819F 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) | #717EA1 | 0.068 |
| Deuteranopia (no green cones) | #61739F | 0.059 |
| Tritanopia (no blue cones) | #008A8B | 0.051 |
| Achromatopsia (no color) | #787878 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #30819F
#30819F
oklch(56.7% 0.09 226.4)
- #A26548
#A26548
oklch(56.7% 0.09 45.9)
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 #30819F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.022
- Teal Blue #01889F ΔE 0.024
- Stormy Blue #507B9C ΔE 0.030
- Blue NCS #118AB2 ΔE 0.034
- Ocean #017B92 ΔE 0.034
- Dull Blue #49759C ΔE 0.037
- Steel Blue #4682B4 ΔE 0.039
- Nice Blue #107AB0 ΔE 0.041
Use #30819F 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.