#277399
Closest named color: Sea Blue (#047495). oklch(52.7% 0.094 234.6), rgb(39, 115, 153).
Aa
White text reads best on this color (5.25:1).
About this color
#277399 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.094 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.016 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #277399 |
| RGB | rgb(39, 115, 153) |
| HSL | hsl(200, 59%, 38%) |
| OKLCH | oklch(52.7% 0.094 234.6) |
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 #277399 | 5.25:1 | AA | Lc -81.1 | Fine for body text |
| Black text on #277399 | 3.99:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #277399 text on white | 5.25:1 | AA | Lc 75.8 | Fine for body text |
| #277399 text on black | 3.99:1 | AA large text | Lc -26.0 | 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 600.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C6D8
oklch(81% 0.042 233.5)
-
Step 400
400
#76A8C5
oklch(70.7% 0.068 234.5)
-
Step 500
500
#5092B6
oklch(63.1% 0.087 234.3)
-
Step 600
600 (this color)
#277399
oklch(52.7% 0.094 234.6)
-
Step 700
700
#23688B
oklch(49.1% 0.088 234.9)
-
Step 800
800
#1F5571
oklch(42.7% 0.073 234.9)
-
Step 900
900
#20465B
oklch(37.6% 0.056 235.2)
-
Step 950
950
#142935
oklch(26.9% 0.035 235.2)
#277399 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) | #61729B | 0.059 |
| Deuteranopia (no green cones) | #516798 | 0.049 |
| Tritanopia (no blue cones) | #007D80 | 0.059 |
| Achromatopsia (no color) | #6C6C6C | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #277399
#277399
oklch(52.7% 0.094 234.6)
- #945B32
#945B32
oklch(52.7% 0.094 54.8)
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 #277399, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.016
- Ocean Blue #03719C ΔE 0.017
- Muted Blue #3B719F ΔE 0.020
- Flat Blue #3C73A8 ΔE 0.031
- Ocean #017B92 ΔE 0.031
- Dull Blue #49759C ΔE 0.031
- Cerulean #457B9D ΔE 0.037
- Nice Blue #107AB0 ΔE 0.037
Use #277399 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.