#407C99
Closest named color: Cerulean (#457B9D). oklch(55.8% 0.077 231.3), rgb(64, 124, 153).
Aa
White text reads best on this color (4.60:1).
About this color
#407C99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.077 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.009 away. White text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.56:1 |
| White text | 4.60:1 |
Values
| HEX | #407C99 |
| RGB | rgb(64, 124, 153) |
| HSL | hsl(200, 41%, 43%) |
| OKLCH | oklch(55.8% 0.077 231.3) |
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 #407C99 | 4.60:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #407C99 | 4.56:1 | AA | Lc 32.3 | Non-text elements, placeholder text |
| #407C99 text on white | 4.60:1 | AA | Lc 71.8 | Content text, not long reading |
| #407C99 text on black | 4.56:1 | AA | Lc -29.9 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E4EBEF
oklch(93.6% 0.009 232.4)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#ABC5D3
oklch(80.8% 0.034 231.3)
-
Step 400
400
#7EA7BD
oklch(70.6% 0.055 231.9)
-
Step 500
500
#5B91AD
oklch(63% 0.071 232.1)
-
Step 600
600 (this color)
#407C99
oklch(55.8% 0.077 231.3)
-
Step 700
700
#316882
oklch(49.1% 0.071 231.2)
-
Step 800
800
#29556A
oklch(42.8% 0.06 231.1)
-
Step 900
900
#264656
oklch(37.7% 0.047 231.6)
-
Step 950
950
#172932
oklch(27% 0.029 231)
#407C99 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) | #6E7A9A | 0.053 |
| Deuteranopia (no green cones) | #617199 | 0.046 |
| Tritanopia (no blue cones) | #008485 | 0.055 |
| Achromatopsia (no color) | #757575 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #407C99
#407C99
oklch(55.8% 0.077 231.3)
- #986749
#986749
oklch(55.8% 0.077 52)
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 #407C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.009
- Stormy Blue #507B9C ΔE 0.017
- Dull Blue #49759C ΔE 0.023
- Metallic Blue #4F738E ΔE 0.029
- Ocean #017B92 ΔE 0.035
- Muted Blue #3B719F ΔE 0.038
- Teal Blue #01889F ΔE 0.040
- Flat Blue #3C73A8 ΔE 0.041
Use #407C99 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.