#00618B
Closest named color: Peacock Blue (#016795). oklch(46.7% 0.102 236.8), rgb(0, 97, 139).
Aa
White text reads best on this color (6.81:1).
About this color
#00618B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.102 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.022 away. White text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #00618B |
| RGB | rgb(0, 97, 139) |
| HSL | hsl(198, 100%, 27%) |
| OKLCH | oklch(46.7% 0.102 236.8) |
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 #00618B | 6.81:1 | AA | Lc -88.0 | Fine for body text |
| Black text on #00618B | 3.08:1 | AA large text | Lc 21.1 | Dividers and decoration only |
| #00618B text on white | 6.81:1 | AA | Lc 82.9 | Fine for body text |
| #00618B text on black | 3.08:1 | AA large text | Lc -19.0 | 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 700.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A3C6DD
oklch(80.9% 0.05 237)
-
Step 400
400
#70A8CC
oklch(70.6% 0.079 237.6)
-
Step 500
500
#4692BE
oklch(63% 0.1 236.8)
-
Step 600
600
#217CAB
oklch(55.7% 0.109 236.8)
-
Step 700
700 (this color)
#00618B
oklch(46.7% 0.102 236.8)
-
Step 800
800
#135577
oklch(42.7% 0.084 236.9)
-
Step 900
900
#194660
oklch(37.6% 0.066 237.6)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#00618B 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) | #4C618D | 0.057 |
| Deuteranopia (no green cones) | #3B568A | 0.045 |
| Tritanopia (no blue cones) | #006C70 | 0.064 |
| Achromatopsia (no color) | #5B5B5B | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00618B
#00618B
oklch(46.7% 0.102 236.8)
- #844915
#844915
oklch(46.8% 0.102 56.8)
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 #00618B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.022
- Light Navy Blue #2E5A88 ΔE 0.028
- Denim #3B638C ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.042
- Dusk Blue #26538D ΔE 0.043
- Light Navy #155084 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.050
Use #00618B 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.